Question about Heating & Cooling
Just to understand what you are saying; You are hooking a wire between the R terminal & the G terminal on the fan control board and the fan runs. When you turn the fan on by the thermostat is does not.
Assuming that you have 24 volts at the G terminal (or wire) at the air handler/furnace when the fan does not run, I would have to say, based on the information that I have been given, that you have a bad fan control board.
Posted on Nov 20, 2011
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