Carrier furnace 59SC5A120 pressure switch fault code #31
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- เผยแพร่เมื่อ 5 ก.พ. 2025
- Carrier furnace 59SC5A120 pressure switch fault code #31
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#MIHeatingGuy
I tried everything I could with this code 31 issue and spent hours with no luck to the point of frustration. This little trick worked and it fired right up. Thank you for sharing this extremely important tip!
Most likely you're going to have to replace the inducer motor To fix the problem Thanks for watching
This video is 8 years old and was the problem on my 2016 furnace.
Amazing! Thank you for sharing and avoiding getting ripped off!
This showed me exactly where my problem was on my furnace when getting the 31 error code. I flushed out the pressure sensor line with forced air and the fault went away. Thank you for this video!
You rock! Thank you for your help!! Saved me a service call and saved my mother from freezing in her home.
Once I found the service code, and then found your video in my search, I pulled the hose and it dropped about 1ml of water! (More than a few drops by far).
I blew it out a bit, dried it off, and .... voila! Fixed. I’ll do the drill fix tomorrow, but the heat is on for now.
Thanks again, your time spent uploading this has helped a lot of people like myself. Woohoo!!
Thank you so much for sharing your tips!!! My 2007 Carrier furnace showed this error code (31) for days, although it "works" occasionally. I took the pain to clear the condensing drain as shown in your video. First, I did get a lot of water (about 1/2 gallon?), Secondly, I did see some dead stink bugs bodies. After thoroughly cleaning the drainage container, the error code is gone. Hopefully, the problem is fixed. There might be other reasons, but the problem shown in the video is one of the problems. THANK YOU AGAIN FOR SHARING YOUR KNOWLEDGE! David
Thank you for the video. We drilled it out & cleaned up the water droplets in there. Furnace came on right away. Thanks again!
This was exactly what i needed. I found this vid the same day as the HVAC guy was coming to check the code #31 on my Carrier 59SPXX. He checked it out, ran fine while he tested it. A few minutes after he left, code #31 triggered again. So I drilled out that port, no more problems ever since.
Amazing! I was dreading an expensive repair but found this video and drilling the hold a touch bigger fixed the problem! Thank you so much for this video!!
I have been working on this error code since Thanksgiving. I found your video and the heat is finally working! Thank you for posting this!
You are the man!! Thanks so much... I googled the code and found your video. Drilled it like you said and turned it on and has worked. From a fellow Michigander I thank you
Drilling out the hole bigger worked!! If I ever move to Michigan you are my guy!
Great video....had the exact same thing happen to my Carrier furnace today. DIY....saved a service call....HUGE THANKS!!!!
I did this and heat works like a champ now! Thank you!
Did this a few weeks ago, haven't had an issue since, has worked amazing! Thanks so much. Cheers
I tried this on my Payne furnace because I had code 31 and it worked. Thank you!
Good video man. I learn about the carrier stuff from you. Like I said before my company is Carrier dealers too. I'm pretty good with them still picking stuff up from you. Best part is I go back to work and mention it and look like a rockstar. Lol.
Thanks for watching hope this helps out
Thank you so much for this! I drilled this out as you said and she fired right up! A few drops of water even came out of the hole like it was plugged up.
This video is great! Even though I have a home warranty I still had to pay to get techs out to fix this little furnace "glitch." I was getting tired of paying them when I figured they will just have to come back out in 3-4 months. So thank you for helping me out that money back in my pocket!!
Check that big rubber 90 degree elbow on the front right of the unit, just to the right of the area that is drilled out first. I had a 31 error code, drilled the port, had the pressure switch replaced, and it turns out there was a dead bird inside that big 90 degree gasket causing the fault
Just got it handed to me on this call! Low inlet pressure!
Thank you, that was easy and simple, working good now!
Glad it helped
Thank you sir. Not sure how much cash you just saved me but I appreciate it bro. I have this model and it wouldn’t stay lit longer than an hour. This seems to have fixed it.
I'm wondering that when you replace these inducer draft motor / housing do the new ones come already pre-drilled ? I recently replaced an inducer and it was an upgrade it came with a adapter plug and some baffles for the mouth of the inducer depending on how big your furnace was but I don't know whether they drill the hole bigger . Just to be on the safe side I drilled it out anyway.
I put a tee and trap on exhaust pipe to minimize water back to furnace.
Was the problem per the bulletin rectified by the 2019 model ??
I finally discovered the problem with code 31 to be a bee’s nest within the outside exhaust pipe from the furnace, it’s a safety feature on the furnace indicating blocked airway.
Cannot thank you enough for the video!
I called ask supplier if there where issues with this model. He said ,no so I ordered new pressure. Where would I find this bulletin.
I'm having a comfort 95 installed tomorrow. Should I ask about the inducer motor water issue or anything else
Great video! Thank you. Didn't know there was a service bulletin on this furnace and a 59SP5A furnace for an undersized draft inducer pressure port that needs to be drilled out.
Also, I have a question on a 59SP5A sequence of operation. I was testing the HPS pressure switch and much to my surprise, when I pulled its sensing hose off of the inducer, the burners kept firing. That didn't make sense to me until I read the heating sequence of operation and it says these contacts are ignored until one minute after the gas valve closes. Obviously, I disconnected its sensing tube prior to the gas valve closing since the burners were firing. Why do the HPS pressure switch contacts get ignored until one minute after the gas valve closes? Thank you!
I replaced the exahust pipes, the pressure switches, did the port drilling thing, primed the drain trap. Keep giving me an error 3. Is there anything else to check? Please help!
Hi. how far back should i drill? Seems to be a hole inside the initial hole. Do i drill all the way back, or no? Dont want to ruin it. Thanks
Did this repair about a month ago worked perfect THANK YOu but the problem is back code 31 again and I can hear water/moisture when the fan turns on. How do I drain the system?
The inducer needs to be replaced. the seal for the shaft of the motor is faulty
Mi Heating Guy Really appreciate the help your video saved us on the coldest night of our winter thank you from my entire family - you rock!
How did you clean your water trap out? The only thing I could do is run water through it which didn't remove any of the mold.
Use vinegar solution on the stronger side
I did this, trap was checked and cleaned, no blockage. Exhaust pipe pitch is correct. Had a tech out twice, he didn’t find or fix anything and still I have the 31 code. Any ideas what to check next?
Replace the inducer motor
I did this about a week ago and this morning I’m running into the same issue with the same error code high-heat pressure switch or relay did not close or reopened. Any recommendations?
Replace the inducer motor and check the venting
man I'd appreciate a lot if u make a video about the conversion from ng to propane i work with trane mostt of the time its simple but with this model unit 59SC2A
I had a same problem now is fixed thank you do much I'll subscribe and bell button for yoi
a lot of these just bad board too. no power to inducer
My tube going in switch was full of water. Drained out over a gallon from 1/2" hose on bottom. My drain trap is hard to blow thru. The trap is in the deck and is hard piped to condensate drain. Can I blow thru it with compressed air?
Yes I use co2 and then flush it with hot water
can we stop talking about Other countries? because these companies are willingly allowing crap products, with errors from the makers. Yet old old homes had stuff running for decades...
Nice video, thanks for sharing!
Hey bro I’m on a service call that is this exact problem.
The Bryant furnace has already had the inducer changed out but then a bird got stuck in the exhaust pipe and inducer housing large 90 rubber elbow. I got the bird out and washed away all remaining parts of the bird from the inducer housing 90.
Checked all drains and it is still throwing me 31..
I have not drilled the hole bigger for the pressure switch. I will try that when I go back tomorrow.
Do you think I need to replace the inducer motor or just drill the hole.
Probably need to replace the motor
@@MiHeatingGuy furnace was overheating, way oversized. New furnace going in today
Mine was installed two weeks ago and is already giving me the 31 code . Garbage . Not sure if I should drill it out myself or call the guy who installed it.
No check the venting to make sure that it has the proper amount of pitch and no sags in the exhaust and properly supported make sure the vent isn't blocked
@@MiHeatingGuy Thanks! Yeah I checked all the venting that goes to the side of my house and it was fine ( all brand new ). Friend of mine who had the same furnace installed recently by the same person said there was suppose to be a recall and they came and drilled out the port like you did in the video .
I just did this fix and it seems to be working fine. My warranty is up soon. Is there something I should get replaced before it is up? Thanks!
+Robert Bronstein a control board just came out with the software and it prevents or helps prevent code 31 has a 4 second delay for the pressure switch carrier started producing the board the 40th week of 2016 thanks for watching hope this helps
i feel like its not your responsibility to alter the actual manufactoring. that needs to be something that company should go in and change for FREE
THANK YOU!
your fan is loud
I don't think it's a good idea to give away this kind of information for not-so-qualified people to fix their own furnace. I had a customer who watched a youtube video so that he could possibly repair his furnace. He ended up taking out the outlet side gas pressure tap on the gas valve and started his furnace on fire. Nothing but melted wires and inducer motor housing. He's just lucky he didn't start the house on fire. Way too much of a liability for someone that is not professionally trained. There's qualified people for every profession, we should rely on them.
+John Patrick this video is for informational purposes only now if a homeowner decides to try to fix the furnace it's their own responsibility but note taking glad that nothing happened thanks for watching
matai06kyodai unfortunately common sense is a flower that doesn't grow in everyone's garden. "Should" is a word used in fantasy land.
Mi Heating Guy informational purposes!?!? I'm sorry but this a profession that you go to school for and spend 5 years in the field to become a Journeyman. You don't learn it from youtube video's! Say what you want, but hopefully your videos don't end up causing a dangerous situation.
Hi I have the same problem with my Carrier furnace. I did used this method to fix my furnace for the first time and it did fix the problem for about 2months. But now that code 31 is flashing again like I have to reset the furnace everyday. Everytime I check that hole you've shown in the video, its always filled up with water so I have take it out. Once its reset, its gonna work for few hours and then it will suddenly stop and would should the code again. I had it serviced with the repair guy three times already but its still doing the same. Please help Thanks
I have same problem now I have to reset everyone and works for half day before get code 31 , did you end up figuring the problem
Hi I have the same problem with my Carrier furnace. I did used this method to fix my furnace for the first time and it did fix the problem for about 2months. But now that code 31 is flashing again like I have to reset the furnace everyday. Everytime I check that hole you've shown in the video, its always filled up with water so I have take it out. Once its reset, its gonna work for few hours and then it will suddenly stop and would should the code again. I had it serviced with the repair guy three times already but its still doing the same. Please help Thanks
Sorry I didn't get back to you sooner I do have other videos on the same problem and it seems the solution is changing the inducer motor the newer motors having a enlarged port so condensation doesn't block the hose port but pay attention to your venting and make sure its to manufacturer's specification At a quarter inch per foot hope this helps thanks for watching
I missed a detail on this video. I only drilled the hole to 5/32 but like you said it has to be 3/16 so hopefully this time I wont have any trouble anymore. Thank you so much for your big help!
Check to see if you have created a problematic double trap through improper tube drain configuration from the condenser.