Top 10 Thermostat Related Problems! Heat and AC!
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- Опубликовано: 4 июн 2024
- In this HVAC Training Video, I show 10 Possible Heating and Air Conditioning Problems that may be the Result of the Thermostat or Thermostat Wiring! If you think the Thermostat is the Problem on the Gas or Oil Furnace, Heat Pump, Air Handler Strip Heating, or Air Conditioner, Check Out this Video! Supervision is needed by a licensed HVACR Tech while performing tasks as Experience and Apprenticeship garners Wisdom and Safety.
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Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
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Other Thermostat Videos (Linked Below)
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Video Playlists:
Inducer Motor Troubleshooting
ruclips.net/p/PLxnHR5_D2ojxxvhtISsS2o6kqylNojBlT
Testing and Wiring Capacitors
ruclips.net/p/PLxnHR5_D2ojwj2amJSXUKVkv4KV4Az5_Y
Troubleshooting Blower Motors
ruclips.net/p/PLxnHR5_D2ojyDrxCT9MIttGW4wxOZ3n-7
Videos:
Top 12 Thermostat Installation Errors- ruclips.net/video/pFF1Cj2VnDQ1/видео.html0
Common Thermostat Wiring Diagrams: ruclips.net/video/h24-n9kyw0w/видео.html
Videos: Thermostats For Furnace and/or AC
Thermostat Wiring Diagram for Furnace & AC Unit!: ruclips.net/video/GoThAlOvSts/видео.html
Furnace & AC Thermostat Wiring: ruclips.net/video/5lxftJiTqLg/видео.html
Thermostat, Furnace, AC not Working ruclips.net/video/j7HeLAZVTzs/видео.html
Thermostat Wiring & Replacement- Colors, Terminal Letters ruclips.net/video/5lxftJiTqLg/видео.html
Videos: Thermostats For Heat Pump
Heat Pump Thermostat Wiring: ruclips.net/video/tf2OxCDwlFY/видео.html
Dual Fuel Thermostat Wiring: ruclips.net/video/HhhesjH9BWI/видео.html
How to Test a Heat Pump Thermostat! ruclips.net/video/4ZbFzXuCu1I/видео.html
Wiring a Heat Pump Thermostat to the Air Handler and Outdoor Unit ruclips.net/video/fFL_ZSkAZM0/видео.html
Heat Pump Thermostat Troubleshooting! ruclips.net/video/HenOWUDX8PQ/видео.html
Understanding and Wiring Heat Pump Thermostats with AUX & Em. Heat! Terminals, Colors, Functions! ruclips.net/video/qiAOvJhq8_s/видео.html
Videos: Thermostat Troubleshooting
Bypass the Tstat for Testing: ruclips.net/video/J9bxLpJpRNE/видео.html
Test the THERMOSTAT with Jumpers! ruclips.net/video/8ubhKcZC-dg/видео.html
How to Test a Thermostat with a Multimeter! ruclips.net/video/Sd3IF3QYIKY/видео.html
Replacement of 2 Thermostats with 1 ruclips.net/video/Sd3IF3QYIKY/видео.html
Thermostat Blank Not Working- Simple Diagnosis! ruclips.net/video/DLYW78mHfbA/видео.html
Wiring The Thermostat, Boiler, and Air Handler ruclips.net/video/JHkGWTdOysQ/видео.html
Tools I Use Are Linked Below!
Leak Detection:
Accutrak VPE Ultrasonic Leak Detector amzn.to/2nFYKVe
Accutrak VPE-GN Ultrasonic Leak Detector amzn.to/2Zy4IZP
RectorSeal Bubble Gas Leak Detector - amzn.to/2ckWACn
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Supco Vacuum Micron Gauge - amzn.to/2v1JRiA
JB Vacuum Pump Oil - amzn.to/2mGrlXy
Checking the Charge:
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RectorSeal Bubble Gas Leak Detector amzn.to/2ckWACn
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
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Nitrogen Regulator - amzn.to/2bXdR5f
Uniweld NitroVue Flow Regulator - amzn.to/2GnsaAo
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Bernzomatic Trigger Start Lighter Propane/Mapp Gas - amzn.to/2vit0cv
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Flint Spark Ignitor - amzn.to/2L3P2u9
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Aluminum Braze Rods - amzn.to/2IGNMu
Electrical Diagnosis Tools:
UEI DL389 Multimeter amzn.to/2xAdaJf
UEI DL479 Multimeter with temp sensor amzn.to/2jtsUbJ
Magnet Jumpers- amzn.to/2PyKPQZ
Alligator Jumpers- amzn.to/2PxqJXn
Irwin Wire Stripper/Cutter/Crimper amzn.to/2dGTj2V
Nitrogen:
Uniweld NitroVue Flow Regulator- amzn.to/2GnsaAo
Uniweld Nitrogen Flow Meter amzn.to/2brvoBg
Nitrogen Regulator amzn.to/2bXdR5f
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25 Valve Cores - amzn.to/2L37UJU
25 ¼” Brass Port Caps with rubber O-rings - amzn.to/2GIOdD2
Brass Valve Core Tool which holds 3 valve cores - amzn.to/2GFEbm2
Valve Core Torque Wrench - amzn.to/2GHiLoD
Locking Cap Universal Lock/Unlock Tool - amzn.to/2GGAoVp
Locking caps - amzn.to/2GFXZ8A
Ratcheting Service Wrench amzn.to/2dGV4Nh
Yellow Jacket Sealright 90 Coupler- amzn.to/2LsU1V7
Yellow Jacket 1pk Compact Ball Valve- amzn.to/2uXdF18
Yellow Jacket 3pk Compact Ball Valve- amzn.to/2AiKfQe
Thumb Screw Valve Core Depressor with Backseat- amzn.to/2mR0sCL
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
I can't change the temp in my thermostat. It's on default mode. What should I do?
0
The homeowner called and said the house was cool before leaving to go to work. Upon returning from work, the house was hot. What is the problem and what action needs to be taken to correct the proble?
My thermostat is blinking and says Auto change deadband differential emergency and won’t turn on the heat/AC do you have any idea what this may be?
Extremely thorough overview of common thermostat problems. As usual, very clear and concise with no unnecessary fluff. Many thanks Craig, and keep up the great work. Much appreciated!
Thanks a lot Ma Ma!
@@acservicetechchannel Ma Ma??? Who's yo Daddy? Yea, Yea, Yea...
Craig your videos just get better and better. Keep up the stellar work!
Thanks a lot David!
Such an understanding video for someone like me with a short attention span. I'm curious about heating system
Thank you .. I fix my ac following you tips
The wire were strip back to far ( old owner ) my heat and cold were going on at the same time thanks you
Wow hard core stuff. Very educational! I have nothing to do electricity but learned a lot from this clear and detailed video. Thanks!
Glad it was helpful!
Excellent Explanation about thermostat... Professional and Didactic causes of problems in different thermostats. Thank you
Best video I’ve seen on thermostat issues!!! 👏🏼
Look. My Wife is gonna turn me into a thermostat if I don't fix it😭😫🙏🏾💯
A black man’s shouldn’t date a white women we need to stick with our race
Very good video,thermostat is the last thing we consider on troubleshooting, most of time
It just depends on if the problem is intermittent or if the system is broke, thanks!
Ac seevice tech..
As always ,great explanation of problems that can and do happen frequently with thermostats!
Very detailed and as always,
Informative video..
Thank you so much for your time and as I've said before..Craig,your a great assett to our hvac industry!
Blessing to you and.your family,
This holiday season!
Bryan Tyler Refrigeration
Helotes,Tx
Thank you very much. I really appreciate your comments Joseph!
You are a very informative Technician very well versed & excellent explanation skills
I appreciate that!
Thanks a lot. My furnace stopped working altogether and it was because of a malfunctioning thermostat which caused by one of the AA batteries leaking. Thanks again.
I love watching this guy, I've learned so much. Thank You!!!
wow! that was an Excellent Video! thank you for sharing!.
Glad to help Jimbola77!
You are excellent! Very good presentation, thank you!
Glad it was helpful!
Fantastic video and well explained in layman's terms.
Great video for tstat trouble shooting. Lots of problems to choose from. Easy way to out rule tstat is jump it out, but then again you can have a short too.
Yeah absolutely and intermittent problems too, thanks!
Ray Ray, I thought u might help me that’s exactly what happened to me I jump my thermosthat with a paperclip , ( I was trying to fix a not start heater) now the AC IS NOT working too. Any tip on which part got shorted ? I just want to fix the AC rite now
Start with the breakers and work your way through the process. My guess is the 5amp fuse blew or the transformer shorted
I’m following only because you helped me and come to find out all it was, was the batteries lol. It’s working now lol, thank you
Very very helpful video👍 thanks
You’re the best I have on RUclips.
I am glad to help! Thank you very much Michael!
Great video guys! I don’t say that lightly, great video!
Totally Agree! This is a Great Video!
Thanks i fixed my old old did i say old lol furnace with the help of your videos ! Turns out it was just a loose wire nut in the furnace . Thanks man ! Got new sub i will check out your other videos when i get time . Thanks again when you hot you hot when your cold your cold we sure was cold ..
Great video sr is great information about the thermostats
Thanks a lot Jose!
Great video, Thanks!
Thanks Joe!
Best, just the best!
Thank you and thanks for the support!
My furnace wouldn't turn on, and I realized that the problem started after I had changed the thermostat batteries. Checked the thermostat wiring and thought that the excess dielectric grease that was on the male and female terminals was causing a problem, then realized that because of the awkward location where the thermostat
was mounted, that the display portion of the thermostat hadn't fully seated all the pins. If you didn't look at it closely, you couldn't see it wasn't seated.all the way It allowed me to run the fan, but not run anything in auto, therefore no call from the thermostat. Motto: Make sure the face plate is fully and evenly seated.
BRILLIANT!
Ty nice video keep up the great work
Thanks Jonathan!
Thank you for your video. My couch (Love Seat) is blocking the "return grill," would it cause the air-flow?
Something interesting, I have a LUX Kono thermistat which is an excellent unit. It has many service settings. I noticed the OLD display is warm and I noticed when you select it on it has to compensate temp offset about 2 degrees, I don't keep it on. It has manual temp comp and how much swing per cycle.
Most newer thermostats are around .7 degrees but I would set it for a higher swing then that. They are concerned with comfort more than efficiency with the .7 and .8 setting so if you are still comfortable and able to, you could set it for 1.2 or another setting depending on that type of stat.
Great job
Donnie, thanks!
Great video! My issue is different. This is the first time I am using my heater this winter. When I try to manually control and push the "hold" feature to hold the temp at say 64 it won't hold. Just a few seconds later the temp will jump to 68 or 70 or 72. My system never did this before. I changed the batteries and even bought a new thermostat and it's still doing the same thing. There are only a red and a white wires coming out of the wall and they're hooked correctly. I did have to re-light the pilot light--not sure why it burned out. Again, I haven't used the heater since last winter. What else can be wrong?
Great video, Thank you for sharing ^_^
Thank you very much!
Thanks great video
Glad you enjoyed it
Hi, should I buy the new thermostat? The adjust temperature down button is working but I need to push it very hard.( it’s White Rodgers thermostat).
Thank you in advance for your answer
Thank you
we have a fairly large AC unit ( has a 24 volt start connector ) outside that runs on Natural gas with a sort of standard forced air heater, When replacing the wall thermostat do i need to get a special amperage rating? What is the difference between a heat pump and an air ( cooler ) conditioner ? Thank you
Good info
Thanks a lot Dean Martin!
Thanks!
Red cable was loose. I moved to the r/c and it works now 😇
Thanks
Hello there ,
My air condition unit at my condo doesn’t cool the apartment below 24 Celsius ,
What could be a problem ?
Thank you for your answer
Hello could you possibly diagnose my problem?
I usually set my AC to 78 in the summer. The AC will reach 78 and shut off. Then once the temp rises it will kick back on as normal. But sometimes it will reach the set temperature and won't come back on at all until I take a small pin and hit the reset button. I just had an AC guy here and he swapped out the thermostat with a new one. Well the problem still persists. A few weeks ago the capacitor was bad and he replaced that as well. Do you think it's the control board?
Can you explain what a liquid line temp sensor is and what would cause it to open or fail?
Thank you.
No worries!
I am having an issue where the temperature readout is incorrect (was reading 58 earlier when it was almost 90 outside and air hasn’t been on). Apparently a battery exploded, which I tried to clean up the best I could but it’s still reading 65-70 when it’s almost 80 outside. I can get it to turn on by overcompensating for temperature and the temperature readout goes down as the house cools but I’d really like it to read correctly and not have it on all day and night until I can get a new thermostat. Unfortunately my toddler will be home tomorrow with another 90+ day scheduled and with this pandemic I can’t just up and jump to a store to get one. Any tricks on cleaning up it better or testing specific components? Can it simply be recalibrated? It is a White Rodgers 1F80-361.
I have a Bryant electric furnace with A/C. Also have a Bryant smart thermostat. When we bought the house we got a warranty. The a/c went out and was determined to be a blower motor, which was a DC variable speed motor. The warranty repaired (replaced) it. They also had to replace a condensation pump. The thermostat requires us to push a red button to request heat, and set the desired temperature and set the time we want the heater to run. (I hate the smart thermostat) So if I warm the house for 1 hour, after the house is warm, or the 1 hour time is reached, the blower will continue to operate on low speed, (blows cold air) I want to replace the smart thermostat with one I can set the temperature and be able to turn it off if we leave the house. (on/off switch) and also included, (heat/cooling) In my mind, this might take care of the continuous running fan motor. I think the fan motor should stop when the temperature that is requested is reached. Currently the fan will always run even after the temperature or the set time is reached. Any suggestions? I am not impressed with the warranty company
Thanks for your advise.
I want control of the temp. I hate smart thermostats!
So do you think if you have a bad thermostat or connections are bad. Would that make the fan run after heat goes off
So I have a honeywell smart wifi thermostat and a carrier gas furnace. Whenever I run the heat and the furnace does it's heat cycle, soon as it goes into 90 second cool down where the fan keeps goin but the furnace isnt calling for heat my thermostat cuts off and then restarts once it's done. Any thoughts?
Question, I have a digital thermostat and live in a two family home and the landlord has the electricity and heat rigged and I've bin noticing that night when it gets cold no matter how high I put the heat the temperature doesn't budge the number stays the same but during the day it's perfectly fine, is it possible that someone else is also tapped into my controls or is there something wrong with the thermostat it self?
😱 omg i this is the first time that I see you in one of your videos!!! I think is the first time ever! Lol
I started putting the face in some of the videos, sorry about you having to see that, ha ha!
AC Service Tech LLC no is actually good! I alway wondered why you never showed your face lol it makes it more personal
I have a 2 wire non progammable honeywell thermostat. How should my wires be cut to make sure that my thermostat doesn't malfunction and lets say keep heating even after it has reached the set temperature?
Just had my thermostat shut down due the float in the Unit shut it off. The condensation pipe was clogged up.
The float shuts off the 24 volt.
What if the batteries in the thermostat are good, the capacitor was recently switched out, and all the switches are on including the breaker, but the thermostat is blank? Any thoughts on that? By the way, I appreciate your extensive knowledge of HVAC systems, even if you go a little fast for me.
My existing system is Gas Furnace and single AC unit. My existing thermostat has C,G,W,Y and R (no jumper). The new Thermostat has the choice of RC or RH with a jumper. (no R). Question: Which terminal do I place the existing "R" wire to? RC or RH? Do I leave the jumper in or remove?
My gas pack hvac system will come on heats up to settings cuts off, and then doesn't come back on when gets below settings unless I cut it off wait till the thermostat clicks then turn it on just had a new thermostat put in old one done the same. Can you help me
ive found the newer t87 round honeywell stats do not work well with newer 90-95% systems.....the new systems have so many microprocessors and sensitive electronics that the tstat robs power from the control board and weird things happen....they work great on older systems that are very basic.. that is just my experience.
Please help, as my HVAC contractor has been unable to address the issues so far. Below are the units which have been purchased and installed in my residence. The installers have spent days re-wiring my Nest thermostats and they still appear to not function properly. Can you provide assistance? Can you provide a definite answer that 3rd Generation Nest should/will work with the below devices? If not, why not and which SMART thermostats will work? I have seen my neighbors with brand new and modern Carrier and Goodman systems which do not have any issues with Nest Gen3.
Thank you,
My furnace thermostat is working but the issue is on winter months our house is a little colder and we need to set it up to 28 degree celcius just to feel the warm. Is there any way that my thermostat is broken?
That thermostat met every requirement for a bad location. 😂
He obviously stuck one on the wall in that spot, probably with velcro, just for the visual effect for the video. 😅
Hi there. My AC on my Hunter AC keeps switching to 82 even though I switch it down on the temperature. Could you help please?
Good
What book of codes do you and other pros in the HVAC field use ?
IFGC 2018, IMC 2018
Sir , I have been auto mechanic since 1975 after my stroke can not work on R&R trans or engine .
which book you recomend to learn
about furnace .I thank you for your response 👌🙏 🫵 🫶 your videos .
Could you make a video about charging a heatpump system during winter R22/410A systems ?
Thank you
I did one on for checking the charge and adjusting the charge between the temps of 40 to 70 degrees- ruclips.net/video/OmQQcjmNLgw/видео.html
Keep up the good work :)
Thanks a lot Pat!
Thanks for this video...lots of good information. Jesus bless.
May The Lord Bless You Too, thanks!
When I jump red and green wire I get the unit to turn on.. after installing the thermostat cover the unit would run a operate to correct temperature, but would not come back on until I jump the red & green again.. why is that?
I have a thermostat that goes on and off every few minutes or so. I replaced the thermostat with exact same type Honeywell TH8321WF 8000 still no fix. Ac lines are not iced up or anything. Any suggestions?
Have 2 heat pumps( trane) with 2 trane thermostats. Both went out at the same time ( opposite sides of house) getting code ‘ heat on… resetting’ on both. How can 2 go out at once?
Problem #3 was my issue, batteries were low and not enough power to close the contacts. And dummy me thought the batteries were just for screen light lol.
Cool
I have a Honeywell RTH7560E1001 for our Heat pump & hydro coil from boiler. When it calls for heat , the heat pump reversing valve works properly and then after a short time it turns on the relay for the taco zone circulator pump. But the heat pump seems to been supplying heat. I'm new to AC heat pumps. Will dual heat at the same time cause the heat pump to trip on the high temp side or is this a normal setup?
I forgot to mention , the hydro coil is downstream of the air handler coil. Am I incorrect to believe it won't affect the air handler coil and cause it to possibly to trip the heat pump on the high side ?
On problem number 3, what can happen if you have a c terminal wire with voltage and batteries in the thermostat?
Will there be another book coming focusing more on the electrical side?
At some point I would love to have one out. It just all takes time. The workbook for the existing book will be out soon. Thanks for letting me know what you would like to see!
I have a C wire. But my new thermostat does not have a c junction. What are my options please.
The temperature on my thermostat reads 81, and I know it is cooler. Air comes on when I set it to 80, but the temperature does not change. I changed the batteries, but still doesn't change.
That’s my problem too. I just shut it off. I think the thermostat needs to be replaced.
When I set the thermostat to 85 all night and by morning it stuck on 76, what could be the problem? Thanks
I changed the batteries and reset it clicks, but the AC or heater do not respond. Any reason why
Air flow with vent last month all where working noticed filter where clogged changes and now noticed only half the vent are letting air out into rooms
My AC fan and furnace only kicks on when the thermostat fan is on but not with switch in auto. Also the coil next to the electric condenser hums all the time unless thermostat is switched to auto mode but then neither AC or heater kicks on. In order to have heat or AC the thermostat switch must be in the on position. The AC unit and furnace are about 30+ years old , we rent by the way and have a slumlord so I'm trying to diagnose this on my own. I am a auto/diesel mechanic but know zippo about appliance electronics. Please help , I'm thinking it could be the thermostat, but not sure why the coil for the fan palms all the time. obviously the fan coil is being energized by the thermostat but why isn't the fan coming on ? The a/c fan motor only comes on when the thermostat is in the on position and not in auto ?! Frustrating.... any help would be appreciated .
OR it could just be that your condensation pipe is plugged up like mine was.
Sucked it out with a shop vac and reset the switch.
do you have anything that explains why new batteries are being drained in less then 24hrs in the thermostat
Second time watching 7/20/2020
For demo purposes you did hang that therm on that wall right?
Ha ha yes I did that one for the video since everything was there!
Sorry to bother yall but I have a Lennox split system. It's a heat pump. When I call for heat, I still getting low voltage to the O terminal. Why? Is it the board? It doesn't have a cube relay.
If my heat doesn’t work when selected only aux heat becomes available, does that have anything to do with the thermostat?
He said you need a jumper between ox and E
If the wires are not connected correctly will the thermostat light up from the battery?
Can you move the thermostat away from an exterior wall?
What if my thermostat wont read 24v but i can read 24v on the control board? My thermostat is also blank. Could it be the control board not sending power to thermostat.
You should have 24v between the r and the c at the thermostat if you do have a c wire there, thanks!
@@acservicetechchannel thank you for the reply. I figured it out. I removed the moisture sensor temporally until it dried and the furnace started working again. I was wondering why all the voltage was good but nothing was coming in from thermostat but i saw that puck looking thing with "moisture" light on and i thought at first it was normal. But when i touched it, it was a little wet so I removed it and it started working again. I let the moisture sensor dry for a day and reinstalled it and now its working perfectly again.
I have a 3 month old hvac it turns on heat for 3 minutes before turning on cold ac. Have had tech out 4 times still does it. It heats up to 110 degrees fast and takes like 3 minutes to start ac. I think the heat strip and ac running at same time. any ideas?
On AC or heat setting? You should get ahold of the manufacturer and tell them. If the tech can't figure that out on one trip, you have a very uneducated tech.
@@Bryan-Hensley Ac set to permanent hold or temp hold doesnt matter. Replaced thermo with same supposedly same problem. Used my own old wire i complain say replace wire with new they refuse.
All of a sudden turning on my central cooling causes the heat to turn on, blowing hot air over 95 degrees. I'm hoping this will be nothing but a thermostat change but how can I tell?
If I caused a short when I used a jumper wire on thermosthat, would it be a short on the air handler or a blown fuse . If it’s a blown fuse how will the fuse look like ? Does it look like a car fuse
Okay around 7:45 you stated that the heat pump thermostat could power the "y" Terminal in heat mode, if you don't mind, could you explain that, please
y powers the compressor which is needed to circulate the refrigerant during heating mode, thanks!
When I switch the thermostat to cool the burner egnite the heat comes on why is that happening
Dealing w/ an older furnace that has older thermostat like the one in your vid...The unit won't turn off even in the off position...Have to shut it off completely & back on, so as not to run up the electric bill...Could this also be a wire disconnected?..Great vid...
Most likely a stuck sequencer, a relay inside the air handler.
@@picturemetrollin2093 Is that located in the furnace unit or the thermostat?..I need to be able to diy it if possible, if not oh well...Thanks
@@lasetlivingstin7752 inside the indoor unit if you have a split system.
@@lasetlivingstin7752there are multiple things that can cause what you describe it depends on what type of system you have. If I'm understanding you correctly, you have a electric force air furnace.
@@picturemetrollin2093 It's gas...Either late 70's early 80's model...I'm not in that location to get the brand...
my problem is, I set the thermostat at 72 but it drops to 68 after a couple of hours? this is an old drafty house and I am a chilly senior.
I work for a company in NJ that serves commercial accounts. I have my universal epa certification and one years experience in the field with no schooling. What might I expect to be getting paid?
Start out pay of about $16 an hour.
If it is a union company, about $18 an hour for first year pay and experience.
DRWLP is about right! Probably around $15 to $20 depending on the company, thanks!
why does the add a wire heat up to100 degrees?