heater fan on today the switch was set to AC
I came in from work today my heater fan was running, the fan was running outside thru the heater exchanger but it had no heat in it and the heater fan inside was blowing. my switch was set to AC, I we...
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more likely the control board at the furnace. had the same thing a few years ago. easy fix, if you have two furnaces take the control board out of the other one if they both are the same, if that fixes it contact dinosour electronics for a new board, about 100.00
