Fan not turning on

[Russ8700]

I just installed a Nest thermostat but it won’t turn the fan on when it calls for heat.  Everything else seems ok and it will turn on the furnace, but no fan. I put the old thermostat back in place and the fan runs fine so I know it‘s not the heating system. I was very careful to note the way the wires were connected to the old thermostat and they’re connected the same on the Nest.  I tried resetting the fan wire (G) and also reset all the wires, still no fan.  I rechecked the connections at the air handler.

I have an oil furnace and three separate heating zones in my house.  Each zone has its own thermostat and I’m currently focusing on just one.  If I can get it to work, I’ll replace the thermostats on the other zones.

Any suggestions? Is there any more info I can provide to help?

[MelbaDT]

Hi Russ8700, 

Sorry to hear about your experience with your Nest Thermostat as well as for the delay. Let's take a closer look into this. 

A few questions — what specific Nest thermostat do you have? Since this is a first time setup, did you check your system’s compatibility with the Nest thermostat with our online Compatibility Checker? Also, could you provide a photo of your wires before and after you installed your Nest thermostat?

Best, 

Melba

[MelbaDT]

Hey there, 

Checking back in — do you still need help with your Nest thermostat?

Best, 

Melba

[MelbaDT]

Hi, 

Since it's been since this thread was last updated, we'll be locking it if we won't hear back from you again within a day. Should that happen, feel free to create a new one should you have more questions or have other concerns in the future. 

Best, 

Melba