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My Fan Never Turns Off. Even if turn off thermostat

Chris3
Community Member

Fan never turns off on my Nest Thermostat. Even if I turn off the thermostat or take the thermostat off the wall. Any suggestions. BTW it does Cool and turns on/off compressor correctly/

3 REPLIES 3

laurentbourg
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Bronze

Double check your wiring. Are you sure you have a wire properly connected to G? When the fan runs, if you switch off your furnace and back on, does the fan continue to run?

johnCNA
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Bronze

You need to check the wiring carefully.  A short between the R and G wires will make the fan run continuously.  Even with the thermostat removed.

laurentbourg
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Bronze

Chris3, could you please also upload a picture of your wiring when you get a chance?