Who knows something about gas furnaces?

thedarkwolf

Diamond Member
Oct 13, 1999
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Every year its something with this thing. This year its something in the draft inducer blower motor circuit.

furnace pics they are rather large.
The PDF for my controller which as far as I can tell is the 35-61 and uses the remote sense setup. I'm getting the code for Combustion Airflow Problems - Lockout. My problem is I can't figure out if my motor is bad or the pressure switch is bad. Going by what it says in the PDF if the switch was stuck closed the motor wouldn't come on if its stuck open it would. Mine never comes on. Is there anyway to test the switch without digging into the guts of the furnace to get to it? I thought that maybe if I just pulled the pressure switch wire I could make it think it was open but that didn't do anything. The motor is 230v and I don't have a good way to hook it up to that. I tried hooking it up to 120v and it didn't do squat but I"m not sure thats enough juice to do anything anyway. Why does my thermostat run through the motor, the red wires coming off the motor, and could the thermostat be the problem?

One of the problems I had in the past was the squirrel cage fan rotted apart and jammed the motor but its free. I wouldn't be surprised to find out the motor was shot now though too. The cage around the fan certainly looks nice and you can see the nice jb weld job I did on it to patch a hole when I replaced the fan.