My Service and Procedure Book- www.acservicetech.com/the-book Support The Channel- www.patreon.com/acservicetech Tool List- www.amazon.com/shop/acservicetech For those that are looking for the tools used in the videos: (Linked Below) UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ Valve Core Removal Tool amzn.to/2uYr8WL Blue Vapor Yellow Jacket Gauge- amzn.to/2Ju7pan Red Liquid Yellow Jacket Gauge- amzn.to/2sSFmGH Quick Coupler for the Gauges- amzn.to/2sTk8Ze JB Test Gauge High Side- amzn.to/2ruQb0l JB Test Gauge Low Side- amzn.to/2qR0utM Manual Copper Tube Swage/Expander- amzn.to/2WRPa1M Uniweld Hydraulic Swaging Tool- amzn.to/2MlrI8m Uniweld Swage and Flare Kit- amzn.to/2T55jyn Ameriflame Oxy Acetylene Torch Setup- amzn.to/2SRm3JF #2 Tip for Oxy Acetylene Torch- amzn.to/2SPDaeD Cap-N-Hook Tip for Oxy Acetylene- amzn.to/2MbhpUk Air Acetylene Torch Setup- amzn.to/2aQalsb 15% Silver Brazing Rods- amzn.to/2gVLyLc Nitrogen Regulator- amzn.to/2bXdR5f Nitrogen Flow Meter- amzn.to/2brvoBg NitroVue Flow Reg- amzn.to/2MiulYv Ultrasonic Leak Detector- amzn.to/2Lw4Zpr UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ Magnet Jumpers- amzn.to/2PyKPQZ Alligator Jumpers- amzn.to/2PxqJXn Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3 Fieldpiece Bead K Type Temp Sensor amzn.to/2DBwKfs Fieldpiece Wet Bulb Temp Sensor amzn.to/2RRI7Tw Fieldpiece TC24 Temp Clamp amzn.to/2qHLyjZ Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq Refrigerant hoses with valves amzn.to/2aBumVI Yellow Jacket Gauge set & hoses amzn.to/2vLVkV9 Yellow Jacket 4 Port Manifold w Hoses amzn.to/2BkuGIq FieldpieceSMAN360 Digital Manifold Set amzn.to/2BdoaD4 FieldpieceSMAN460 Digital Manifold Set amzn.to/2nB4Fe6 Compact Ball Valve for Refrigerant Hose amzn.to/2KUisW8 QuickDisconnect 90 for refrigerant hose amzn.to/2MMtVcg JB 6 CFM Vacuum Pump amzn.to/2nqbvo8 Appion Blue 3/8" to 1/4" Vacuum Hose amzn.to/2uYlVyc Appion Red 3/8" to 1/4" Vacuum Hose amzn.to/2uYg6Ro Appion Valve Core Removal Tool amzn.to/2uYr8WL Yellow Jacket 1/4" by 1/4" hose amzn.to/2umtcod CPS Vacuum Micron Gauge amzn.to/2v1nM3O Supco Vacuum Micron Gauge amzn.to/2v1JRiA RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn UEI DL389 Multimeter amzn.to/2xAdaJf Other tool links can be found in the video description section. Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech
Bravo sir....if you’d had done this presentation 18 months ago when I started at the job I have now, I wouldn’t have had to hunt down thermostat diagrams and electrical theory to understand it on my terms how these thermostats work. This should cut out the guesswork of most guys who don’t have 30 years into the electrical field as I have and make installs or the wiring needs easier to apply in their situations...
I've been looking at several videos on heat pump thermostat wiring as well as talking to a Honeywell tech who gave me wrong instructions. This video finally gave me the correct wiring setup for my Goodman heat pump and a new Honeywell stat with AUX heat. I had a black wire that the Honeywell tech told me to connect to "E"emergency and white to AUX. I asked about jumping the "E" and AUX and he said no. I got no heat in "E" mode so I removed the black wire and jumped the "E" and AUX and everything works. The black as well as a brown wire are "extra" if needed. This video was the only one that said the black and brown were extra. Great Video!
Boy, my head is spinning from this power-packed information! I watched twice and really have a great grasp on how my HVAC system was incorrectly installed. Thanks so much! Subscribed!
Hey man you help me out so much in the field, and I just wanted to thank you for that. I started my HVAC company 2 years ago quit my high paying maintenance mechanic job and it’s been a roller coaster ride ever since but everything is going very well. Keep up the good work with your channel!
This video was THE clear and detailed description I have been looking for. Specifically, you mention Ruud and Ream heat pumps with their B wire @6:37 which is my system. Thank you so much!
After wading through a bunch of low-effort SEO spam websites trying to understand this type of wiring, your video made it all crystal clear in one swoop. Huge thanks!
Outstanding!!! I've been trying to figure out the wiring on my new Honeywell thermostat. This is the FIRST comprehensive explanation I've seen to date.
This video helped me resolve 5 years of Hell. NO WONDER my AC never ran correctly. The custom home I bought (second owner) has a heat pump with two zones and a zone controller. But only 5 wires pulled to the thermostats. This video makes it clear I need a 6th wire for the reversing valve. I followed the instructions with a makeshift 6th wire and my AC works perfectly. Thanks again for making sense out of this for me.
Ok figured out the problem. The PCB had been rigged to bypass a soldering fault in the G connector plus something had gone low causing the fuse to blow. The PCB should have been replaced at initial installation. Shoddy work. New PCB cost hardly anything and all is up working fine thanks to your RUclips and Nest (great customer service). I now understand all (well almost all) of the electrical side of my HVAC Thanks again.
I don't think it matters a lot but it seems to me rheem and ruud are the ones who are doing cooling and heating in relation to reversing valve in the right way and other HVAC manufacturers are running it in the opposite way lol. Thanks for your continuous sharing of knowledge!
I think of it in the opposite way because I live in a cold climate. If the coil on the reversing valve is bad, it will still operate in heating mode which would be more of a necessity but it really depends on the location in which you live as far as what a necessity is, thanks!
Thank you for a very clear and easy to understand video on heat pump wiring. I had a system that ran on the o wire and the new system is on the blue wire. Your video helped me figure out why the system was heating on the cool setting and cooling on the heat setting. Simple reprogramming of the thermostat problem fixed. 👍
thank you for 2 days I have been trying to figure out why my heat strips were connected to the outdoor unit and had the misconception that the W terminal from the thermostat was the heat command . your explanation provided complete understanding of how it actually works
Actually you spoke at my speed and I’m tired at 11pm. Wrapping up a heat pump installation and I’m sucking up this information as I get confused 😐 Thank you!
I had to watch this twice to get it but I'm not qualified as an a/c guy. After the 2nd time, I realized the function at the thermostat changed the voltage command the respective part or parts to run Air , cold air, reversal to heat, resistance heat, and emergency heat. At least it helps understand also what is not happening when your trying to get heat or cold air. I'm gonna take a class if I get a chance .
Awesome explanation of what every other video skims over. How the voltage flows and over what wires and when... that’s what I was looking for. Thank you
Thank you so much. I needed to bypass my cdef board. I think the contactor relay is fried. Bought a cheep Amazon board DOA no lights when connected and CB turned on. FRUSTRATING. You get what you pay for. I normally do Aircraft and Automotive AC. This was exactly what I needed to get my house cooled off while I find the right board. I did wire in my pressure sensors. They work fine, good 410A refrigerant pressures. Just a bad board. Hvac co estimated $1,101.68 to replace the 100 board with less than 20 push on or screw on connections... Give me a break. I said 1/2. No way we will starve. Never mind I will fix it myself!!!! Thanks yo you its working perfectly and safe in cool mode until I can get the board.
Best, just best explanation on You tube I’ve ever seen! I've little bit been confused about Aux and Electric terminal on heat pumps. California. Now the wiring combinations is clear to me. BIG thank you, Craig. Interesting, so electric strips helping to achieve set temperature faster. Also, I've met a gas furnace on Aux in Seattle. Coool!
Hey Tapch MC, glad to help and thank you for your support on Patreon.com/acservicetech - Yeah so aux is powered when the thermostat notices that the heat pump cannot keep up on its own or the temp is set up to far compared to the actual temp in the building. The electric strip heating is downstream of the coil so it won't effect the coil's heat rejection and will add to it to get the air hotter, thanks and look at some of the other videos I linked in the 18 thermostat video playlist in the description. There are others that describe the aux too, thanks!
This is great. Thanks for explaining. I've had multiple HVAC guys out to try to diagnose our heat pump/ electric grid system. Each time, after they left and I paid the bill, the system was worse than before they came. Since no one around here seems to be competent, I had to learn it myself. The last time they came, they hooked the white wire to W in the thermostat rather than to AUX/E. Only the heat pump would run, and we didn't get any backup electric heat. I fixed that issue and now both the heat pump and electric heat work! I still have one issue going on. When the outdoor heat pump turns on, the compressor cycles repeatedly every 15-20 seconds. Also, the large air fan on the heat pump doesn't turn on. It was turning on recently, but between all the guys that have messed with it, it has stopped working. I just wonder if there is anything in the wiring that could be causing this? If I am understanding correctly, the heat pump compressor and fan are both triggered by the same wire? By the way, the first guy who came out checked the refrigerant pressures, looked for leaks, and said everything was fine, but added a little bit of refrigerant. I don't think the refrigerant is low.
I think ya did a fine job of explaining the 6 wire layout. Thanks that’s what I needed. (I’m dealing with an old ass coleman heatpump [1979-80?]) As you know an electrician is useless as an AC guy. You might have just changed that. 🤣😂 Really tho… thanks man.
Yeah that's if the installer before you using the standard color codes. I know a building that used blue for O/B and Orange for common and other colors off matched. Sometimes you just have to verify what colors are hooked up to the control boards.
You always need to look at the indoor unit when replacing a thermostat and look at what terminals the old tstat was connnected to. This was more for when you are installing it and running the wires, thanks KCTech!
Confused about the connection between the W terminals on heat pump and air handler, and the E/aux terminals on the thermostat. The W on the heat pump is an output (as you say), but the E/aux on the thermostat is also an output. So those two outputs are connected together, so doesn't that cause an electrical conflict (sort of like a short-circuit) ?
From my heat pump, the tech installed - Orange, Blue, Red and black going to the control board at the furnace. But I’m not sure where they would go to. On the control board it shows - W , C, R, G, and Y
Great video quick question i have a 3 wire oil furnace if i touch white and blue wire together heat comes on otherwise if i put blue into c it does not work what im i doing wrong
Hi question, I'm switching from a Trane thermostat to a Honeywell T2 Non Programmable Thermostat on our Trane split system Heat Pump with Emergency Heat strips (I Think). The Trane has a Blue , Orange, Green, yellow, red, and a white wire coming out of the wall, There is also a cross over W1 (White wire) on the Trane going from W1 to W2/X2 on the Trane thermostat Our . The Honey Well has a place for a O/B wire. Does the Orange wire from the Trane go in the O/B slot on the Honeywell or the Blue wire?, and does the Blue wire from the Trane go in the C slot on the Honeywell?
I have a Fujitsu mini split, I use a adapter (UTY-TTRX) to connect to nest. On the adapter it doesn’t have O/B input to connect to. On the nest it show the wire are connected. When I call for heat it light up orange, but the air handler doesn’t not power on. Thanks
Hello. First, awesome video. I finished wiring new heat pump and elec furnacea, everything works A1 thanks to your videos. I only got one question, hope you can help: at the end of swapping old system with a newer one ( bought second hand) i still have a temp sensor left. It was hooked om the indoor coil, but i have no idea were it should be pluged. Both wires are red and i have no indications. Tried to found the answer elsewhere but non succes. So what does this sensor do and where it should be plug ? Thank you.
I understand the wiring. How would i wire the heat pump system with a gas furnace? Me being a Pa resident we don't have air handlers The O is geting me confused since the board on the furnace don't have o
Very helpful but still confused for my heat pump thermostat. There is no C. I have a W, Y, R, G and B (Rheem) that I understand. Then also black wire to E and brown wire to X. One must be auxillary heat, the other? Hoping to wire a smart thermostat.
Craig, or anyone here. I have a honeywell t9 thermostat. I'm pretty sure I wired it correct. One problem is when in cooling mode, then pressing circulate the AC condenser runs. In heat mode, then pressing circulate, just the blower runs. Any ideas or just contact Honeywell? It does cool and heat normally when in normal mode.
Great video Craig! I was referencing this the other day installing a hybrid dual fuel system just like the setup in your video. My question is if the heat pump terminal strip has a "D" Defrost terminal which is energized with 24v when the heat pump goes into defrost mode can I run a wire from the heatpump "D" terminal to W2 on the furnace terminal strip so the furnace comes on while the indoor coil is getting cold in Defrost mode? The defrost is controlled by the heat pumps Board or one of its boards.
I am building a small concrete house. i think what i am wanting is a water to water heating and cooling system. i will plumb the floor and the walls. there will be no air or ducting or fan. will i be able to set my temperature to 74 year round ? thank you for being here.
I was working on a heat pump package unit and programming the new customer supplied thermostat and no e terminal was present but when put into emergency heat the heat strips would turn on and compressor would not turn on my question is if the Y and O terminal are not powered with W and just W is powered does that activate the heat strip as well because the thermostat knows no E terminal is present?
Why would the thermostat send power to the fan relay in aux heat? I thought the fan was turned on by the sequencer with electric strip heat, and then through the fan relay's NC contacts? If you send power through g in aux heat you would have the fan running in high speed and subsequently reducing the heating efficiency the heat pump is producing.
My heat pump would not come on only the electric elements in the air handler. I tested voltage at the unit and all was fine. If I jumper the Yellow and white at the control board on the outside unit the heat pump comes on and works. The Ac will not cool with it jumpered. I am in Florida so don't use the heat much and just did the jumper trick for last winter. This year I ordered a brand new control board thinking that was the problem. Heat pump will still only work if I put a jumper in on those 2 wires. Any Idea what else to check? Otherwise, I will just keep doing the jumper as we only have +- 12 days year to run heat anyhow just a bit of a hassle to have to remove the cover and put the jumper in and out.
What would happen if the G wasn't hooked up - doesn't the Heat pump see the call for R+Y and know to turn the fan on using the internal furnace board logic? Is it really necessary for the thermostat to call for G in parallel? I was under the impression the G+R call is specifically when you want airflow without heating/cooling.
Great video of how to wire thermostat to air handler and heat pump ..I’m working in a thermal zone heat pump split system with a wiser air smart thermostat that won’t turn heat on ,indoor blower comes on but no heat in the house , works fine on cooling mode but no heat . NEW THERMOSTAT WIRES are connected to new terminal phase plate Red to RC, Yellow to Y ,Green to G Brown to C and Blue to O/B any suggestion . Thanks in advance 🙏
You really need to turn the power off to the air handler and check to see what color wires are for which function inside the air handler in order to wire the thermostat, thanks!
Hi, I don't understand how come some systems only connected Y from thermostat to outdoor Y but not connected to the air handler. Can you explain that to me?
Thank you-when I jump the white (heat) wore at the thermostat, it blows the 5 amp breaker, but not when I turn the system on to heat with the thermostat plugged in; then the blower motor semi-cycles, runs, and clunks. Neither the green (fan), nor the cooling wire reacts the same. There’s no dedicated ground wire at the thermostat. Perhaps the white wire needs changing?
From the thermostat take off cover and remove wires. Check continuity from white to the other wires with your multimeter, listen for the beep. If no beep then check the thermostat wires at the air handler. Sounds like u have a short in the W but you have to figure out what it’s shorted to and replace the wire. Either use the spare wire from the thermostat or from the AH. If you have no wires than you will have to fish new Tstat wires (May need a professional)
Thank you. My compressor and condenser fan quit working. I only have 5v on the Yellow wire outside. I can now trace it back to the Thermostat and find out why.
My Service and Procedure Book- www.acservicetech.com/the-book
Support The Channel- www.patreon.com/acservicetech
Tool List- www.amazon.com/shop/acservicetech
For those that are looking for the tools used in the videos: (Linked Below)
UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ
Valve Core Removal Tool amzn.to/2uYr8WL
Blue Vapor Yellow Jacket Gauge- amzn.to/2Ju7pan
Red Liquid Yellow Jacket Gauge- amzn.to/2sSFmGH
Quick Coupler for the Gauges- amzn.to/2sTk8Ze
JB Test Gauge High Side- amzn.to/2ruQb0l
JB Test Gauge Low Side- amzn.to/2qR0utM
Manual Copper Tube Swage/Expander- amzn.to/2WRPa1M
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Nitrogen Flow Meter- amzn.to/2brvoBg
NitroVue Flow Reg- amzn.to/2MiulYv
Ultrasonic Leak Detector- amzn.to/2Lw4Zpr
UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ
Magnet Jumpers- amzn.to/2PyKPQZ
Alligator Jumpers- amzn.to/2PxqJXn
Fieldpiece ST4 Dual Temp Meter amzn.to/2wc1ME3
Fieldpiece Bead K Type Temp Sensor amzn.to/2DBwKfs
Fieldpiece Wet Bulb Temp Sensor amzn.to/2RRI7Tw
Fieldpiece TC24 Temp Clamp amzn.to/2qHLyjZ
Yellow Jacket Refrigerant Gauge Set amzn.to/2aenwTq
Refrigerant hoses with valves amzn.to/2aBumVI
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UEI DL389 Multimeter amzn.to/2xAdaJf
Other tool links can be found in the video description section.
Shop through Amazon! Your Purchases through Amazon provide a means for channels such as mine to earn advertising fees from all purchases after clicking through. Prices are the same as normal- www.amazon.com/shop/acservicetech
Bravo sir....if you’d had done this presentation 18 months ago when I started at the job I have now, I wouldn’t have had to hunt down thermostat diagrams and electrical theory to understand it on my terms how these thermostats work. This should cut out the guesswork of most guys who don’t have 30 years into the electrical field as I have and make installs or the wiring needs easier to apply in their situations...
Thanks Todd, glad to help!
This is the best AC wiring summary to be found, and your diagram is outstanding.
I've been looking at several videos on heat pump thermostat wiring as well as talking to a Honeywell tech who gave me wrong instructions. This video finally gave me the correct wiring setup for my Goodman heat pump and a new Honeywell stat with AUX heat. I had a black wire that the Honeywell tech told me to connect to "E"emergency and white to AUX. I asked about jumping the "E" and AUX and he said no. I got no heat in "E" mode so I removed the black wire and jumped the "E" and AUX and everything works. The black as well as a brown wire are "extra" if needed. This video was the only one that said the black and brown were extra. Great Video!
Ha ha, that's awesome! I'm glad it helped you! Thanks for the note!
Boy, my head is spinning from this power-packed information! I watched twice and really have a great grasp on how my HVAC system was incorrectly installed. Thanks so much! Subscribed!
Thanks a lot Sweet T Art! Check out the resources on the website at www.acservicetech.com as well, thanks!
Hey man you help me out so much in the field, and I just wanted to thank you for that. I started my HVAC company 2 years ago quit my high paying maintenance mechanic job and it’s been a roller coaster ride ever since but everything is going very well. Keep up the good work with your channel!
Thank you very much. Your video kept me from having a hot night in Texas. You are an 'A Team' member... and you would be B.A.
Great description and saved me from having to have service call on some basic wiring.
This video was THE clear and detailed description I have been looking for. Specifically, you mention Ruud and Ream heat pumps with their B wire @6:37 which is my system. Thank you so much!
After wading through a bunch of low-effort SEO spam websites trying to understand this type of wiring, your video made it all crystal clear in one swoop. Huge thanks!
Outstanding!!! I've been trying to figure out the wiring on my new Honeywell thermostat. This is the FIRST comprehensive explanation I've seen to date.
@AC Service LLC - You do know what you’re talking about, thank you for being so honest and spread the knowledge, what goes around comes around.
Thanks a lot Erwin!
This video helped me resolve 5 years of Hell. NO WONDER my AC never ran correctly. The custom home I bought (second owner) has a heat pump with two zones and a zone controller. But only 5 wires pulled to the thermostats. This video makes it clear I need a 6th wire for the reversing valve. I followed the instructions with a makeshift 6th wire and my AC works perfectly. Thanks again for making sense out of this for me.
Glad to help Sheldon!
Sir, you are an awesome HVAC instructor. Super clear explanations!
Glad you think so!
Your wiring diagram at 9:34 saved me from heat stroke. Thank God for how to videos!!!!!!
Ok figured out the problem. The PCB had been rigged to bypass a soldering fault in the G connector plus something had gone low causing the fuse to blow. The PCB should have been replaced at initial installation. Shoddy work. New PCB cost hardly anything and all is up working fine thanks to your RUclips and Nest (great customer service). I now understand all (well almost all) of the electrical side of my HVAC Thanks again.
I don't think it matters a lot but it seems to me rheem and ruud are the ones who are doing cooling and heating in relation to reversing valve in the right way and other HVAC manufacturers are
running it in the opposite way lol.
Thanks for your continuous sharing of knowledge!
I think of it in the opposite way because I live in a cold climate. If the coil on the reversing valve is bad, it will still operate in heating mode which would be more of a necessity but it really depends on the location in which you live as far as what a necessity is, thanks!
I agree, I always thought the reversing valve was activated in heat mode on all units.
First time i ever heard an hvac guy run a spare Conductor Good job !!!
Thank you for a very clear and easy to understand video on heat pump wiring. I had a system that ran on the o wire and the new system is on the blue wire. Your video helped me figure out why the system was heating on the cool setting and cooling on the heat setting. Simple reprogramming of the thermostat problem fixed. 👍
thank you for 2 days I have been trying to figure out why my heat strips were connected to the outdoor unit and had the misconception that the W terminal from the thermostat was the heat command . your explanation provided complete understanding of how it actually works
Finally I know how my furnace work with heat pump! Thanks alot! Very well explained and detailed
Glad it helped
Actually you spoke at my speed and I’m tired at 11pm. Wrapping up a heat pump installation and I’m sucking up this information as I get confused 😐
Thank you!
I had to watch this twice to get it but I'm not qualified as an a/c guy. After the 2nd time, I realized the function at the thermostat changed the voltage command the respective part or parts to run Air , cold air, reversal to heat, resistance heat, and emergency heat. At least it helps understand also what is not happening when your trying to get heat or cold air. I'm gonna take a class if I get a chance .
Awesome explanation of what every other video skims over. How the voltage flows and over what wires and when... that’s what I was looking for. Thank you
Glad to help sheldon!
Glad to help sheldon!
GREAT for DIY installation. Saved me from a cold night ! Thank you !
Glad it helped!
Thank you so much. I needed to bypass my cdef board. I think the contactor relay is fried. Bought a cheep Amazon board DOA no lights when connected and CB turned on. FRUSTRATING. You get what you pay for. I normally do Aircraft and Automotive AC.
This was exactly what I needed to get my house cooled off while I find the right board.
I did wire in my pressure sensors. They work fine, good 410A refrigerant pressures. Just a bad board.
Hvac co estimated $1,101.68 to replace the 100 board with less than 20 push on or screw on connections... Give me a break. I said 1/2. No way we will starve. Never mind I will fix it myself!!!!
Thanks yo you its working perfectly and safe in cool mode until I can get the board.
Best, just best explanation on You tube I’ve ever seen! I've little bit been confused about Aux and Electric terminal on heat pumps. California. Now the wiring combinations is clear to me. BIG thank you, Craig. Interesting, so electric strips helping to achieve set temperature faster. Also, I've met a gas furnace on Aux in Seattle. Coool!
Hey Tapch MC, glad to help and thank you for your support on Patreon.com/acservicetech - Yeah so aux is powered when the thermostat notices that the heat pump cannot keep up on its own or the temp is set up to far compared to the actual temp in the building. The electric strip heating is downstream of the coil so it won't effect the coil's heat rejection and will add to it to get the air hotter, thanks and look at some of the other videos I linked in the 18 thermostat video playlist in the description. There are others that describe the aux too, thanks!
Another great video, I have learned a lot more from you then my hvacr teacher from years ago lol.
Thanks a lot Ace, glad to help!
This is a great video to watch before wiring the basic RTH111 Honeywell thermostat for an old 'GE Weathertron' heat pump.
Clear as water. Amazing explanation
Thanks a lot
This is great. Thanks for explaining. I've had multiple HVAC guys out to try to diagnose our heat pump/ electric grid system. Each time, after they left and I paid the bill, the system was worse than before they came. Since no one around here seems to be competent, I had to learn it myself. The last time they came, they hooked the white wire to W in the thermostat rather than to AUX/E. Only the heat pump would run, and we didn't get any backup electric heat. I fixed that issue and now both the heat pump and electric heat work!
I still have one issue going on. When the outdoor heat pump turns on, the compressor cycles repeatedly every 15-20 seconds. Also, the large air fan on the heat pump doesn't turn on. It was turning on recently, but between all the guys that have messed with it, it has stopped working. I just wonder if there is anything in the wiring that could be causing this? If I am understanding correctly, the heat pump compressor and fan are both triggered by the same wire?
By the way, the first guy who came out checked the refrigerant pressures, looked for leaks, and said everything was fine, but added a little bit of refrigerant. I don't think the refrigerant is low.
Beautiful explanation,will like to hear about the 2stage heat & 2stage cooling on the heat pump
Very thorough lesson.
Thank you sir!
Thank you Tomon8tor!
This was exactly what I needed. Thank you for the great explanation!
I think ya did a fine job of explaining the 6 wire layout. Thanks that’s what I needed. (I’m dealing with an old ass coleman heatpump [1979-80?]) As you know an electrician is useless as an AC guy. You might have just changed that. 🤣😂
Really tho… thanks man.
very informative, learned how to run my wires in plain language and the coding of each wire and function
Thanks a lot!
Yeah that's if the installer before you using the standard color codes. I know a building that used blue for O/B and Orange for common and other colors off matched. Sometimes you just have to verify what colors are hooked up to the control boards.
You always need to look at the indoor unit when replacing a thermostat and look at what terminals the old tstat was connnected to. This was more for when you are installing it and running the wires, thanks KCTech!
Rheem / RUUD system units
This answered a question I had yesterday. Thank you!!
Awesome! Glad to help!
Awesome vid...well presented and explained. Thank you for posting it!
Thanks a lot Steven!
Confused about the connection between the W terminals on heat pump and air handler, and the E/aux terminals on the thermostat. The W on the heat pump is an output (as you say), but the E/aux on the thermostat is also an output. So those two outputs are connected together, so doesn't that cause an electrical conflict (sort of like a short-circuit) ?
This is a great help to us oil guys!!!!
Thanks Mongo!
How many views man. You have got it going on. Keep it up
where was this when I needed it 3 hours ago!? aaaarrrgggh....
Thanks for simple explanation and diagrams
Another well explained and presented video.
Thanks a lot Kenny!
So informative, hope to see more new videos in the future
More to come!
Oh yes great video, very clear, excellent graphics. Good job.
Exactly what I needed. Thanks!
Glad it helped!
You are great it's very helpful.THANK YOU.
Glad it was helpful!
From my heat pump, the tech installed - Orange, Blue, Red and black going to the control board at the furnace. But I’m not sure where they would go to. On the control board it shows - W , C, R, G, and Y
I would have had a much better day today if I watched this video 12 hours ago lmao. Oh well, at least now I know better
Can I disable my AUX/EM mode by simply disconnected the AUX/E wire ?
Very good 👍
Great video. Very helpful. Thanks
Glad it was helpful!
Awesome!! Thank you very much for this! Exactly what I was looking for!!
Very nice explanition
I LOVE YOUR VIDEOS THANK YOU SO MUCH , I just order ur book as well !!!
Awesome! Thank you!
Thanks . Perfect explanation .
Glad it was helpful!
Excellent. Thank you!
Glad it was helpful!
Really the clearest explanation of the themo wires and what they do. Subbed & upped you for that my friend. Thanks alot!
Great video, thanks 🤙
Tanks you videos they are lot help.
Very good idea
Thanks for liking
Great video quick question i have a 3 wire oil furnace if i touch white and blue wire together heat comes on otherwise if i put blue into c it does not work what im i doing wrong
Thanks AC Service Tech!
Thanks Eddie!
This is what I got on mine:
Red: to R with jumper to RC
Yellow: to Y
Brown: to C
Blue: to OB
Green: to G
White: to AUX
Is this right?
Yep
Great video man.
Glad you enjoyed it
Wow. Thank you so much!!
You're welcome!
Thank you
Great video and explanation, Thank You.
Regarding the Nest thermostat same wires application?
Thank You
Very good information thank you sir
Thanks ejohnfall!
Excellent video. Thank you.
Hi question, I'm switching from a Trane thermostat to a Honeywell T2 Non Programmable Thermostat on our Trane split system Heat Pump with Emergency Heat strips (I Think). The Trane has a Blue , Orange, Green, yellow, red, and a white wire coming out of the wall, There is also a cross over W1 (White wire) on the Trane going from W1 to W2/X2 on the Trane thermostat Our . The Honey Well has a place for a O/B wire. Does the Orange wire from the Trane go in the O/B slot on the Honeywell or the Blue wire?, and does the Blue wire from the Trane go in the C slot on the Honeywell?
Great Video.
Glad you enjoyed it
I have a Fujitsu mini split, I use a adapter (UTY-TTRX) to connect to nest. On the adapter it doesn’t have O/B input to connect to. On the nest it show the wire are connected. When I call for heat it light up orange, but the air handler doesn’t not power on. Thanks
Hello. First, awesome video. I finished wiring new heat pump and elec furnacea, everything works A1 thanks to your videos. I only got one question, hope you can help: at the end of swapping old system with a newer one ( bought second hand) i still have a temp sensor left. It was hooked om the indoor coil, but i have no idea were it should be pluged. Both wires are red and i have no indications. Tried to found the answer elsewhere but non succes.
So what does this sensor do and where it should be plug ?
Thank you.
How would you wire in a safety float switch between thermostat and air handler or heat pump? To cut power if water builds up
I understand the wiring. How would i wire the heat pump system with a gas furnace? Me being a Pa resident we don't have air handlers The O is geting me confused since the board on the furnace don't have o
Amazing video! Very didactic ! Thank you
Hello
The C wire is only carrying volts back on it path to the contactor.?
Very helpful but still confused for my heat pump thermostat. There is no C. I have a W, Y, R, G and B (Rheem) that I understand. Then also black wire to E and brown wire to X. One must be auxillary heat, the other? Hoping to wire a smart thermostat.
First 🤔 but this early ACSERVICE TECH?
Ha ha, yeah a little early today! Thanks Gabriel!
Craig, or anyone here. I have a honeywell t9 thermostat. I'm pretty sure I wired it correct. One problem is when in cooling mode, then pressing circulate the AC condenser runs.
In heat mode, then pressing circulate, just the blower runs. Any ideas or just contact Honeywell?
It does cool and heat normally when in normal mode.
I installed the WF honey well from the non WF honey well the new WF is not switching my valve is this done by the program. ??
Great video Craig! I was referencing this the other day installing a hybrid dual fuel system just like the setup in your video. My question is if the heat pump terminal strip has a "D" Defrost terminal which is energized with 24v when the heat pump goes into defrost mode can I run a wire from the heatpump "D" terminal to W2 on the furnace terminal strip so the furnace comes on while the indoor coil is getting cold in Defrost mode? The defrost is controlled by the heat pumps Board or one of its boards.
Rheem / Ruud ,,, B is reversing valve. Activated in heat mode instead of cool. 🤔
So is it possible to rewire to plug without the furnace an thermostat?
If my heat pump is not functioning and I want to change my primary heating from Heat Pump to Furnace which wire do I need to move in thermostat?
You do not need terminal O on your air handler. From the thermostat the O wire go straight out to the outdoor heat pump.
I am building a small concrete house. i think what i am wanting is a water to water heating and cooling system. i will plumb the floor and the walls. there will be no air or ducting or fan. will i be able to set my temperature to 74 year round ? thank you for being here.
I was working on a heat pump package unit and programming the new customer supplied thermostat and no e terminal was present but when put into emergency heat the heat strips would turn on and compressor would not turn on my question is if the Y and O terminal are not powered with W and just W is powered does that activate the heat strip as well because the thermostat knows no E terminal is present?
Why would the thermostat send power to the fan relay in aux heat? I thought the fan was turned on by the sequencer with electric strip heat, and then through the fan relay's NC contacts? If you send power through g in aux heat you would have the fan running in high speed and subsequently reducing the heating efficiency the heat pump is producing.
My heat pump would not come on only the electric elements in the air handler. I tested voltage at the unit and all was fine. If I jumper the Yellow and white at the control board on the outside unit the heat pump comes on and works. The Ac will not cool with it jumpered. I am in Florida so don't use the heat much and just did the jumper trick for last winter. This year I ordered a brand new control board thinking that was the problem. Heat pump will still only work if I put a jumper in on those 2 wires. Any Idea what else to check? Otherwise, I will just keep doing the jumper as we only have +- 12 days year to run heat anyhow just a bit of a hassle to have to remove the cover and put the jumper in and out.
What would happen if the G wasn't hooked up - doesn't the Heat pump see the call for R+Y and know to turn the fan on using the internal furnace board logic? Is it really necessary for the thermostat to call for G in parallel? I was under the impression the G+R call is specifically when you want airflow without heating/cooling.
Great video of how to wire thermostat to air handler and heat pump ..I’m working in a thermal zone heat pump split system with a wiser air smart thermostat that won’t turn heat on ,indoor blower comes on but no heat in the house , works fine on cooling mode but no heat . NEW THERMOSTAT WIRES are connected to new terminal phase plate Red to RC, Yellow to Y ,Green to G Brown to C and Blue to O/B any suggestion .
Thanks in advance 🙏
You really need to turn the power off to the air handler and check to see what color wires are for which function inside the air handler in order to wire the thermostat, thanks!
Great video thanks.
Can I use a heat pump thermostat on regular a/c ?
Hi, I don't understand how come some systems only connected Y from thermostat to outdoor Y but not connected to the air handler. Can you explain that to me?
Thank you-when I jump the white (heat) wore at the thermostat, it blows the 5 amp breaker, but not when I turn the system on to heat with the thermostat plugged in; then the blower motor semi-cycles, runs, and clunks. Neither the green (fan), nor the cooling wire reacts the same. There’s no dedicated ground wire at the thermostat. Perhaps the white wire needs changing?
From the thermostat take off cover and remove wires. Check continuity from white to the other wires with your multimeter, listen for the beep. If no beep then check the thermostat wires at the air handler. Sounds like u have a short in the W but you have to figure out what it’s shorted to and replace the wire. Either use the spare wire from the thermostat or from the AH. If you have no wires than you will have to fish new Tstat wires (May need a professional)
Thank you. My compressor and condenser fan quit working. I only have 5v on the Yellow wire outside. I can now trace it back to the Thermostat and find out why.
Thanks!