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Goodman 90% gas heater condensation build up

I have a new Goodman gas furnace with the exhaust going vertically out to my roof. After the heater fires up and runs for a few minutes, the housing gets about 4 oz. of water in it and will not fire up again until I remove the pressure tube and drain it. Why is the system getting condensation in it, and how can I stop it?

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  • Bobusa Oct 17, 2007

    Thanks! I actually figured out that the installer did not connect a drain line at all. The drain nipple was capped off from the factory and this is exactly why it was filling up with water. The installer should have known but did not. I guess these newer high efficiency furnaces create water vapor. My vertical exhaust is also dripping a little bit of condensation. When the installer comes out today, I'll have him look at that too after he runs a line to my drain pipe. Problem solved!



     



    Thanks for your help!!!!!

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If the exhaust comes off the top of the furnace, you will need to make sure the condensation will drain all the way back to the condensate outlet found at the base of the inducer blower. If you are having to remove the tube from the pressure switch, there must be a blockage from the inducer down to where ever it drains to. Check to see if all tubes are free of blockages and if there is a condensate trap, clean it out. If the pressure tube you mentioned is facing up toward the blower allowing water to flow into it, reposition it so water will not enter the tube.

 

Posted on Oct 17, 2007

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