Most Common and Basic Problem on High Efficiency Furnaces!

I would love to see AC Service Tech to get into commercial/industrial HVAC; Boilers, chillers, cooling towers, VAV reheat systems and such.

That happened to me on a no heat call a few months ago. The unit was a 2013 Carrier 95% with an ECM motor. About the same thing happened in this video except there was also dirt in the trap and one of the pressure switch hoses had water clogged in there as well. Cleaned the living crap out of the trap and cleared the hose leading to the pressure switch. I also did a little maintenance by cleaning the flame sensor, making sure the filter was good and making sure the sequence of operation was not interrupted during the heating cycle (Customer didn't have maintenance done in a bit). Unit came back on like nothing happened to it. Definitely not fun to do in a crawlspace with a bunch of those massive cave crickets (sprikets or criders as some call it), but was glad to see the customers was heating again before the winter months hit. Thanks for the video! Extremely helpful for a tech who is beginning to get their feet wet in this field! 😎👍🏾

Had a situation where the condensate drain was backing up and the inducer and fan motor just kept on running with a 3 blink error code showing pressure switch stuck open. The pvc drain wasn't allowing any air into pipe and water was stuck inside. Added a Tee and water began to fall out better.

My case was similar to this (Day and Night brand) which is Carrier. Cleaning trap- condensation didn't solve the problem because the problem still exists. Called technical support and recommended inducer replacement. replaced inducer work for 3 weeks then started making a noise like a 1960 Chevy muffler. Called tech support again and recommended replacing the trap and inducer with a choker install. I did what they asked me to do, and it worked ever without any problem.

That's a good explanation of the basics regarding the condensate traps and lines.

I’m doing new construction on these carriers now two of the biggest issues are pressure switches stuck closed and exhaust flue pipe not draining back to the collection box because the PVC is bowed back to the drain. And nobody wants to check static and gas pressure to set the blower speeds up. The new carrier furnaces have an app to set the profile on carrier service tech app. Goodman has coolcloud app… great video

Why do the manufacturers not make these traps more cleaning friendly? Also, putting the clear side facing out would help identify potential issues.

Thanks want about ultra lownex pls do some research carrier and Lennox

Great videos as always. There is 1 problem carrier also has. The male fitting where the pressure switch tubing connects to is sometimes filled with water and this is due to the 6 to 8 aluminum fins behind the inducer need to be bent 90 deg towards HEX. Please let me know if any of you came across this, causes a lot of issues on the carriers.

Can you make a video explaining hydronic systems and the fan relay on them.

Had this problem with a Goodman furnace. It would intermittently trip during the night time and It took me 3 recalls to the customers house to figure it out 😢

very educative.Thank you .regards

Please do a video on ultra low nox furnaces

Another nice video as always I like your videos. When you’re publishing another book like steps by steps heating gas furnace procedures like the same book you had for Air Conditioning?

Thanks for sharing your knowledge, Happy New Year Craig!

Great video Craig. Thanks for sharing and Happy New Year.

I believe trap issues are caused by incorrect plumbing after the trap and incorrect temp rise ( too low) over the heat exchanger. Correct those issues and the trap will not plug up

The most common problem I found on high efficiency furnaces is the intake the flu gets clogged up with leaves

The issue I have is that, that foam seal imprints and may not seal back up after a removal and cleaning of that trap for those newer models…

up to how many degrees celsius the external ambient temperature can the motor of the split and vrf air conditioner withstand, minimum and maximum temperature