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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
Silver Product Expert
Silver Product Expert

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
Bronze
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
Silver Product Expert
Silver Product Expert

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