How to Test Pressure Switch on a Furnace
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- Опубликовано: 16 июл 2024
- How to Test Pressure Switch on a Furnace. In this video I show 3 ways how to check a pressure switch. The first method is to measure continuity and resistance while the furnace is running. The second method is to check voltage on the pressure switch while the furnace is running, and the third method is to put a manometer in series with the pressure switch to see what vacuum pressure the inducer motor is pulling and if it matches/exceeds the rating of the pressure switch.
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#wordofadvicetv #furnace #heating #hvac #airconditioner #airconditioning
Wow such a useful video. The reason it’s so different in my opinion is that you explain all the other systems and how they relate to the switch. You talk about the process, etc. most other videos strictly stick to testing the switch with no explanation of what it does or how it relates to the whole system
I have an issue with my furnace the igniter coil is not getting hot everything sounds to cycle but I test the line for power to the coil and nothing.. also the code it’s giving is 3 blinks of witch is a bad flow but I checked everything and nothing seems to be blocking the flow of air . I changed the circuit board . And thinking of changing the coil and pressure switch .. if you have any advice I would appreciate it .
I spent my last ten years of working doing hvac trade, I wished I had found your videos back then. I would have been such a better tech. No one would invest the time to explain issues the way you do. You are doing a great service for all techs out there and then some. Thank you.
Hey guys, our furnace was running today but no heat. When I checked everything, I noticed one of the wires connected to the pressure switch wasn’t plugged in. When I plugged it back in, the heat came back. Would that have caused no heat? I’m still not sure why the wire was disconnected.
They most likely didn’t explain the issues because they weren’t knowledgeable themselves. Not all technicians are equally knowledgeable.
Hi I can't find the exact pressure switch for my can I hit an universal switch. The serial for mine is FS6633-1488 and is a .41 wc of.
Wow amusing practical explanation.
I’ve been in the HVAC field for 27 years... I must say that’s a great video
Means a lot coming from a veteran in the field! Thank you!
Thank God and thank you for giving out the information needed to fix furnaces. Husband followed your advice and took a carpet needle to clean out the very dirty tube connected to the Pressure Switch. The furnace has been out for days, and he was dreading disconnecting the metal exhaust for fear it might break. We thought it had a blockage. You said if the door panel is off and the furnace still has a problem, it is most likely not blocked exhaust. The furnace blinked 3 times, indicating an open pressure switch, or exhaust issue. You said to clean out that tube, and VOILA'! It WORKS again. You will be rewarded for helping people...maybe not in this realm, but the next.
YOU ARE SIMPLY THE BEST! May the joy of the Universe be with you at all steps of your life! Very educational and kind of you!
hoooollly sheeesh , I didn't knew the thing about the voltage drop, that explains so much
As a novice in HAVC repair , I really appreciate Jay you making those awesome, clear and simple videos. Thank you Jay!!!
I had a bad pressure switch a few years ago & I blew on the hose & sucked on it .
I got the switch to work again but like you said, I went ahead & replaced the switch.
No problems since.
I watch all your videos & have saved a lot of money by doing the repairs myself using your videos as a guide.
Great job!
Thank you thought it was a pressure switch problem until I watched one of your videos I opened the sealed combustion plate furnace started up and cleaned the intake tube and discovered 2 died mice blocking the intake. cleaned and furnace started right up.Saved me $200 plus thank you again.
I am an hvac technician and this information never gets old. You should not become to complacent because that is when you make mistakes. This is a well done video with great troubleshooting. Good job
This guy explains things so easy, more than my instructors, really smart guy. Thank you for the videos.
You're welcome! Glad to hear the videos are helpful :)
Your are doing a good job,I have 6yrs on hvac and till learning from your videos thanks for your tips
You're a natural teacher. Good video.
Thank you! Glad you liked the video!
Awesome HVAC instructor 👨🏫
I always enjoy watching your tutorials- keep rockin the HVAC world.
Thank you! Glad you liked the video :)
Dude, you are a Godsend! House was 48 degrees last night and 40 degrees this morning - and it's 20 degrees outside in the middle of New Hampshire winter. HVAC repair companies told me they could come out in about 7 days to take a look. Thanks to your excellent videos I took my time watching them, was extra careful with turning off power and not touching anything with the power on (other than with meter probes) and found and fixed a flaky pressure switch. House is back to 68 degrees again. Thank you for your excellent videos!
Wonderful! Love to hear that you were able to find and fix the problem! God bless you and yours, stay warm!
HVAC isn't my line of work but I do greatly appreciate and enjoy your instruction.
You're a smart guy and you do so well at explaining things.
Thanks Kyle! Glad you like the videos!
Great video. My home gas furnace would not ignite. I watched several of your related furnace diagnostic videos. I fixed it myself. One of the pressure switches was stuck. I simply blew softly into the tube until I heard the switches click. This fixed the problem. The furnace lit right up. Amazing. Saved me time hassle of calling a repairman, and probably over $200. You are doing a great service.
JerryK..
Just came to this site randomly, but I must tell you that you explain this very well and I don't know much about hvac..anyone with little knowledge and follow your instructions can make some of repairs themselves..Thanks
Thank you so much. I just got EPA CERTIFIED and looking to get into the field. I confess I'm lacking confidence but videos like this help a lot.
Iam a service tech , I have 10 yrs doing this job, but I still like to learn from other people. I do comercial and residencial this guy is very smart and explan well . Jeep it going with your vídeo and good luck.
Wow, you video just helped me fix my broken Carrier furnace. The problem was error code 43, known as "Low-heat pressure switch open while high-heat pressure switch is closed". I followed your instructions and determined the pressure switch was working. Then I disconnect the tube from the switch and followed it up to the burner chamber where I found 2 very dead mice clogging the intake funnel for the pressure switch tube. I carefully removed the mice pieces with a vacuum and the furnace fired right up! If you use a vacuum, be certain to disconnect the tube from the pressure switch so the vacuum doesn't blow out the switch. Thank you very much for sharing your expertise!
Thanks for the video. Huge help. About 2 hours ago I had no idea about this order of operations about the inducer motor, pressure switch, and igniter. Just tried turning on my furnace to test it (it is almost 24 years old) and no go. Inducer came on, but nothing else. Well i work on trucks for a living and have no experience with house hvac systems. This video helped me to solve the problem. Pressure switch was not closing when inducer motor kicks on. Tested it by blowing in it, working as it should. Found plugged fitting where the hose goes in by the inducer motor. Cleaned it out and got her flowing. She fires right up now.
I have been dealing with a no heat issue for a few days now and all research related to my issue was useless and then I found your videos and now I know my issue is with the pressure switch! Great job on your videos and I'm sure I'll be watching more of them
Glad to hear you were able to narrow down the problem! Good luck with the rest of the repair!
I am not a HVAC person at all, but this video is great. I just removed the inducer motor components from my old furnace and I was wondering what that circular metal thing did. One search of the part number told me it was a pressure switch. Then, my second search for how furnace pressure switches work lead to this great video.
Such a helpful channel. I saved having to have another service call out to fix what ended up being a plugged pressure switch hose. The furnace was intermittently cycling after a few minutes for months, without any error code (thanks Lennox). I finally I got a pressure switch error code, which ultimately got me checking the switch voltage + hoses and it fixed my issue. Thanks so much!
new homeowner here trying to tackle HVAC... i must say you've got the best residential HVAC videos on youtube! you make everything so easy to understand. i thank you for doing these!!
I had a service guy come out, told me i had a bad motherboard-after he blew my home circut..??i told him to leave my home!! This guy does a wonderful job! Should teach tech class!
Thank you so much for your videos they really help me out a lot for a new tech in the field.
I love how you explain checking the first pressure switch, seems like you need to go one step further and explain when to check the second switch if the first switch checks good..... Thanks
THANK YOU, you saved me so much Money! I could not figure out why the furnace was not igniting, everything tested out okay, until you said " Blow in the pressure switch tube" I pulled mine off and somehow the inducer end of the hose connection had a piece of rust stuck in it. I got it out, connected the hose back up and Viola! I had heat again. So again Thank you very much! I was at the point where I was about to call an HVAC tech, because I will not mess with any of the "gas parts" just checking connections, igniter ect.
Dude I’m a plumbing and heating technician. I’ve learned more from you then any of my trainers over the years ever taught me. Don’t get me wrong I pretty much know my stuff but there are tips and tricks you’ve shown that has helped me out a lot. Question which hvac tool bag do you use? You should do a video on that. 👊
I've watched several of your videos. All are well laid out, explained, and easy to understand. Thanks.
How lucky I am as a new tech to have tutorials like this.... It must have taken much longer to learn all this information before HVAC channels like yours came around. Thanks for all content! I try to learn as quick as I can in the field... but as you know things are usually done quickly and explanations to apprentices are usually understandably short and condensed... if at all... These videos are great for reinforcing what I have learned in the field but at my own pace.... Your channel seems to have a video on almost every topic I need to learn about...
You're welcome! I'm glad to hear the videos are helpful! I know what you mean, no matter how fast you learn, it still takes a few years to become comfortable with HVACr repairs. Everybody is a beginner at one point. I was lucky and had good mentors at my second job but on my first one, the explanations were brief and incomplete like you mentioned so I'm happy to be able to help new techs with my videos!
I am a plumber as well spot on my friend quick and easy explanation 👍👍
Thank you!! Had 3 flashes on the LED. My pressure switch was stuck open. I tested it for continuity and found it was definitely open. Made sure nothing was blocked. Still wasn’t working. Took tube off and sucked the switch open and closed a few times and that worked!! Ordering a new pressure switch.
Should add it’s a Heil 75kbtu single stage
Excellent demo , with lots of knowledge with practical experience above all your hardworking to be in detailed information to your viewers, thanks
You're a great tech, but more importantly for this purpose, you're a great teacher and videographer. Saved my freezing cold butt and made my wife think I'm a hero!
Good tips you gave me:
1) Easy peasy on the suction when testing the pressure switches. The suction created by the inducer is way lower than what you can generate manually.
2) Don't jumper the switch until the unit kicks on and has gone through its self-checks. I never would have considered that.
3) My problem was not the switch. Your videos prompted me to consider the exhaust tube going up through the roof. I don't know what was in there. Vacuum didn't bring anything down, so I reversed the vacuum hose and blew it out. I have no idea was was in there, but once I did this and put it all back together: HEAT! Glorious heat! And just when I was about ready to start burning the furniture too!
Your comment was both informative and entertaining! I appreciate you taking the time to leave a comment of your repair highlights! Hopefully no more troubles with the furnace for the next 20 years now ;) Stay warm!
Thank you. always great to see someone who knows what they are talking about. fixed my Carrier wethermaster 8000. turned out to be the reset button just above the pressure switch the wire was connected to. we had some weird weather last night my water heater also stopped working, , just had to relight the pilot light. .
Thank you my switch was intermittently not working. No voltage or continuity. I then watched your video about bypassing the switch and the furnace turned on!
Jay
Thank you very much for taking time and making great troubleshooting videos on almost all components of HVAC system. Great Job 👏
I've been in HVAC for 27 minutes but a DIY'er from birth and want to say the same as HVAC Doc. Good instructions and follow-up.
Great videos. Your tutorial helped me out when even the tech could not figure out why the furnace would not kick on. When I watched your video it ended up being a plugged nipple where the hose from the pressure switch was connected to. Unclogged the nipple, and voila furnace has worked since then. Awesome vids, I can't thank you enough on explaining how the whole system on the furnaces work. Last note: the tech said he was going to order a new board for the furnace, your video said that if the board was out there should be some burn marks somewhere, there was not any. This got me to thinking it was something far simpler that caused the furnace not to kick in. I was always taught to start with the simplest solutions first. Anyways you saved me at least 700 bucks!
Awesome! Glad to hear my videos helped :) Kudos on getting it fixed yourself! (By the way, thought I would mention it just in case.. There are times when there are no visible defects or marks on the control board yet it is still bad but yeah, many times there will be a burnt mark) And I very much agree with your last statement! Gotta start with the simplest solutions first.
I kinda ended up in HVAC training a couple months ago just out of the blue, and this is exactly the kind of stuff I've been dealing with the last few weeks.
Thanks for all your videos. Small verbal glitch, ".3" is greater than ".17" - think you meant to say ".03".
I have a big fat test today on this, and I want to thank you for this video 🤣😭😂😂
thank you. understood, this is the second reply, the person that reply the first time was upset and sounded like they were answering a different question. deathangel is unknown to me. but the answer sounds like it came from the clear thinking young man on the video how to test pressure switch on a furnace. I now understand the events after the thermostat calls for heat. Having the devil to find part numbers for 15 year old coleman furnace. thank you again.
Man u are awesome, great informative video
Clear and concise your efforts make the world a better place to live in and that inspires me
I live on a fixed income and have no money for home repair i live on a subsistence level income
It's just after 2 am , and with the information you shared I now have hot water to do dishes and shower
You could have held that information for a ransom and called it a service charge but instead you share it with all of us
And I appreciate that oh, you gave an old man peace of mind and Blissful rest thank you
Nice 👍 to watch a video with good audio. I’m hard of hearing, but you speak very clearly, so I can hear you
just fine. Thanks
By the way, I subbed...
Glad you liked the video! And thank you! I hope the future videos won't disappoint!
You sir are amazing . Your videos do have great depth of clarity . Thank you for this service and efforts to people 🙏✊👍 god bless.
You are an excellent teacher.
Born teacher!! Thanks a million brother!
those hands are super clean for a tech, good explanation of that pressure switch though.
Lmao
Great video. I like watching videos like this for refreshers, and like other comments. I’ve never been explained certain things. Cheers.
Excellent illustration. Thank-you
Thank you very much for the video
As always you’re awesome!
Thanks Arturo! Glad you liked it!
Resistance, voltage (0), or closing pressure. Good explanation. Usually just replace pressure switches by the circuit board error code. They get hard & buggy with age, like me.
Thanks! I was trying to find out if it was normally open or closed. You answered that!
We thank you for your all amazing videos, you are awesome.
Very thorough with your explanations. Keep up the good work!
Thank you!
Great instructional video. Very knowledgeable instructor.👍🏽
Nice tutorial,I just started classes and it helps me.thanks
thanks mate, your videos are great, thanks heaps from Melbourne Australia cheers
Another great video with clear suggestions, etc. Thank you for getting me out of another jam with our furnace not working. Pressure switch was the issue. Keep up the great work!
Thanks again Jay !
i was getting a pressure switch error code so i came across this and started diagnosing. It started working again......great.....now it'll go out when we really need it.
Hello from your newest fan. Your video just bailed me out of a no heat situation over a weekend. Could have been ugly. Thank you for the informative videos !!
You rock. Im gonna be a great tech because of your videos when i get out of prison
wow great video tutorial...
thanknyou for sharing your knowledge; very informative,
you can make your own trainning center .
keep safe always sir 🇸🇽
fabulous video. best on the net. thanks.
Another GREAT video!! Thanks Jay!
Glad you liked it :)
thanks for making very informative video vey well explained
Thank you, your videos are great. Very detailed.
Thanks for your time
Love your style my man
Super helpful! Thanks for the excellent video!
Very nice. Keep up the great videos. Very helpful! Thanks
great video. clear and easy to understand. cheers
Excellent troubleshooting...switch ohmed out well..but was not transferring the load..I tapped on the switch and immediately dropped from the 28 volts to zero.then ignitor glowed...excellent videos..thank you
wow, that was a lot of information to digest!, thank you for making this video
Excellent, just excellent concise information here!
I'm an HVAC student and I just want to say that you broke this down better than my instructor. He's a great instructor but the way you explain everything makes it way easier to understand. I liked and subscribed! Thanks for the videos!
You are such a great tech and an ecellent person. Thank you very much.
Very well as always you are very good at what you do thanks for the the video and God bless
Thanks Jaime!
You are the best technician
silicone vs silicon ...... Great video.. I'm watching all your furnace videos!!.. THANK YOU...
Glad your liking the videos! Thank you for watching and commenting!
Thank you! It helped me fix my furnace
another great video thank you
Thank you for your content
Wonderful video, thanks for sharing this
Man I love your vedio I clean my sensor w I th a piece of sand paper and turn on boiler wallah ,I feel like a rocket scientist
Thanks man.
Ishwar Ballie .
I learn so much from you .Thank you
Another amazing informative video.Man you're genius.Tx.
Great job and thanks.
Very good show!
Always great great content. 👍🏻
Great video!!!!
Great Video, I enjoy your channel, a lot! ✌️👍
Happy to hear it! Glad you liked the video!
Good video thank you
Great vid cheers
Thanks for the video =)