Furnace Troubleshooting Condensate Piping
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- Опубликовано: 25 июл 2024
- Furnace tip for professional HVAC contractors. Make sure that your condensate piping is configured properly. This short how-to video will show you the important points. Visit nordyneu.com for more FREE Tips
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best HVAC video on RUclips. the only one to clearly explain the condensate drain properly. turns out, if the drain hose goes below the water level on the condensate pump it will not drain properly and furnace can go into lockout due to inadequate negative pressure. such a simple thing, but i bet many people have changed out many parts including pressure switches, inducer motors, and other parts just to fix this simple overlooked problem.
here is the problem essentially. you have a furnace, it works normally for some time and cycles then goes into lockout. the pressure switches are clearly working normally otherwise why would it work normally for some time to begin with. so clearly there is a drainage problem. an obstruction is the first thing to check and clear on all pipes (intake and exhaust), hoses and ports.
Very helpful tip regarding double trap issue. Replace two pressure switches on a 4 year old York furnace - would start up today, until I removed the condensate pump, where the furnace drain was submerged! Thank you.
Thank you for responding to my question. Your analysis makes sense and your explanation is understood. Thank you again for your time.
huge help!!! had no clue why i kept getting a pressure switch code when it was a good switch thank you
I appreciate this information as I am tracking down the three flash signal on the control board. Everything points to the pressure switch. Although I'll cleanup and re set te Condensate Pump,thanks for the information!
Dude, you just save me $2-3k. Most technicians wanted to swap out my entire controller or install a new unit. The furnace works great again!!!!!
I'm so happy I found this video. Perfectly explained what I needed to know.
double trap knowledge, priceless! Thanks 5 million!
I am subscribing!
Great infromation here, thank you for posting, furance kept intermittently working, could not figure out the problem for almost 2 years it was very intermittent,my drain tube was causing a double trap I believe. Hope this was the issue.. seams correct as it would work for a week than quit, float valve open, drain tank, furance would work again till tank filled back up. God please let this be the issue
great video. now i know im having a condensate issue that its making my pressure switch to stay open. I broke my head for hours because the switch checked ok. I cant wait to go fix that thing tomorrow. thanks again
+Jose Vargas Glad we could help!
dude...i just happen to view this...great job!
181855
My sump pit got too full water stopped draining water backed up got into vac switches and then the gas valve which then shorted out the circuit board on a new furnace so i drilled holes in the drain pipe just above the pit. Thanks for the good video.
Hi, whenever the pump fires up, it makes noise that gets louder as it nears completion of a pumping cycle. Been doing this for well over a year now. Could it be overworking itself due to blockage somewhere or maybe suction problems? We have no idea.
Thank you so much your video was very helpful thank you again
we collect the water coming out of the furnace in a huge pot for the plants , bad idea ? no comp pump just a little black box on the side of the outside of the furnace
Thank you, this explains my issue. 🇺🇸
Excellent video. Could you elaborate on the double trap issue and how the secondary one 'cancels' the first? I'm having a hard time wrapping my head around that concept.
I know what your taking about. And understand concept, can all go to one P-trap and work correctly? or multiples individually
Just found the condition you described where the condensate drain pipe was submerged in the condensate drain pump well. I cut the pipe to stay above the highest level of the water in the well and I am waiting to hear back from the client if this solved the problem with the pressure switch opening during the call for heat.
Glad to hear the video helped. Thanks for letting us know.
you may have a cracked transition ,see if the water runs inside after the inducer stops .that usually caused by a cracked transition
Great video. thanks.
Thanks!!
I just found my short cycling problem because the drainage hose was dipped into the reservoir of water creating a double trap making the switches unhappy. Thank you!
I'm very fluent in automotive vacuum systems and switches. Maybe someone can explain the actual purpose and function of the vacuum system in these furnaces? Regards.
I am not a tech but my understanding is that the vacuum line coming from the inducer blower shows a vacuum if the blower exhaust air is making it to the outside. If there was a blockage on the exhaust pipe (which would be a dangerous condition) then there would be no vacuum on that line and the vacuum switch wouldn't allow the furnace to turn on.
Thanks
I had a motor replaced for seven hundred dollars recently and now we are getting a bad smell when the heat kicks on and I found water condensation on the foor and inside the furnance cabnet. What would cause this? The unit is about 6 years old and this is a new problem. Thank you.
So how to you keep the line from freezing when drain is run outside?
Let’s the drain line stays indoor with a mini AC drain pump + a viny line to pumping water into the washing machine drains.
Does it count if it goes into the drain of a sink its just in the down pipe which is not filled with water synthesis condensate connection
Hi Armando, anytime air can be drawn through the drain line of the furnace, the drain on the furnace must be trapped, as the trap on the furnace is used to create an air lock. If any drain line is trapped twice it will not drain.
Add air gap or vent before any potential 2and trap
great video, ill stop submerging the condensate piping in the water inside the condensate pump.
The PVC pipe that carries the condensate into my sewer line froze. I learned this after seeing some water on the floor at the foot of my furnace. I warmed that pipe and cleared the ice. The furnace is working, and it is blowing hot air, and the condensate is dripping into the bucket that I am temporary using to catch it. Is it possible that while the pipe was frozen, the condensate backed up and only spilled over inside the furnace and then down onto the floor? As the furnace runs at the moment, I don’t see any additional water coming from the base of the furnace. I’m no expert, obviously, but I may just open it up and take a look inside before having a technician come over. Not being familiar with this, I’m imagining that maybe nothing needs repair. Is this possible? If not, I am hopeful it’s something I can fix myself.
So if it drains into the floor, should i not have a P Trap inside the unit?
Hi Robert,
Yes, the drain has to be trapped before going to a floor drain.
do it matter which drain you trap?
Costgard condensate drain seal
not enough examples shown to inform clearly..eehhhhh