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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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Re: Goodman 90% gas heater condensation build up

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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