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Learning Thermostat causing blower fan to turn on, off, then on.

rrubida
Community Member

I replaced my Nest Thermostat with a Nest Learning Thermostat, and since the switch the blower fan will turn on then off while the furnace warms up.  The fan will then turn back on with a vibrating sound, and work properly.  I did not have this issue with the other thermostat.

Only wiring difference is the learning thermostat has a rc and rh (Original just had R), and I have the wire in the rh slot.

 

Any suggestions?

1 REPLY 1

maedacortez
Community Specialist
Community Specialist

Hi rrubida,

 

Thanks for reaching out! To resolve this issue, could you please send a picture of the backplate so I can check if the wires are connected correctly If the wiring looks good, I can then help you find the best solution.

 

I look forward to your reply.

 

Regards, 

Manuel