The motor fan that pushes burned flue gases out of a GMP 100-3 furnace is running a minute on, a minute off in cooling mode.
This may be also for #12 expertise.
The schematic shows the motor runs from a 120V enabling relay in a control PCB.
Seen that behavior before when gas was not igniting and 're-trying', 're-trying' in heating mode. But it is in cooling mode now, when such fan should be always off.
Any clues on what to check ?
This may be also for #12 expertise.
The schematic shows the motor runs from a 120V enabling relay in a control PCB.
Seen that behavior before when gas was not igniting and 're-trying', 're-trying' in heating mode. But it is in cooling mode now, when such fan should be always off.
Any clues on what to check ?
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