Question about Goodman GMS90703BXA Heater
I turn on the ac on thermostat and it works , but the blower motor in the furnace wont turn on . the board blinks 4 red and 4 green.
I would check the "G" wire at the Thermostat and make sure that it has a solid connection. The other end screws on to a terminal in the furnace. Check this connection as well. This green(G) wire is what activates the 120v relay on the circuit board. You can test this by turning the thermostat to the off position and then jumping the 24v R terminal with the 24v G terminal at the furnace. if the fan comes on then the problem is in the thermostat wire or the thermostat itself.
Posted on Jul 15, 2008
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Posted on Jan 02, 2017
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