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Issue with my American Standard High Eff Furnace
I have a dual stage American Standard Hi Efficiency gas furnace that was installed approx 2004.
In January of this year, I woke up one morning to a very cold house. A service tech came by and determined that the condensate had collected and backed up and fouled the pressure switches. He drained everything out, and ensured that everything was working correctly before leaving. A few months later (as the weather began warming up) I noticed that the inducer motor was running a 100% of the time, even when there was no call for heat. As it stands now, it always runs as long as there is power to the furnace.
The LED fault light is giving me the 3 quick flashes indicating a pressure switch problem. If I power down the furnace, then power back up, the furnace will cycle and run properly.
I've checked all of the drain tubes and they seem to be dry and free and clear of obstructions.
I'm wondering if the pressure switches may have gone bad simply from having had moisture in them previously. And if so, if this is an issue of merely replacing them. If it is merely replacing them, is this something that I can do without screwing anything up such as a CO leak or anything like that.
Any thoughts or suggestions?
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