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Fan doesn't turn on for heat or cooling (Gas + Forced Air system)

antderosa
Community Member

My fan works when turned on manually with the Nest but is not automatically turning on when heating or cooling, which is necessary to blow hot or cold air on my forced hot/cold air system. I have a gas furnace and central air.

My wiring setup is G W Y R

There are two extra wires that were not attached to the old thermostat which I wasn't sure what to do with so I didn't connect them to the Nest.

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