cancel
Showing results for 
Search instead for 
Did you mean: 

Nest Thermostat not turning on automatically

geneg21
Community Member

I recently installed a Nest Thermostat but, for some reason, the heat (furnace) does not turn on automatically at the scheduled time nor does it turn on if I manually increase the temperature on the display. However, if I go to the "Fan" setting and tell it to run for any amount of time (15 minutes, 30, 45, 60, etc), the heat (furnace) kicks on and produces heat. I can do this both from the display as well as from the phone app. I have a forced air (oil) system and the house is only about 20 years old. Any help/suggestions would be greatly appreciated. Thanks in advance.

2 REPLIES 2

Jake
Community Specialist
Community Specialist

Hey there,

 

Sorry for the late reply. I wanted to follow up and see if I could be of any help. I found an article with more details on the temperature schedule. I also found an article with some troubleshooting steps for strange heating behavior. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further. 

Best regards,
Jake

geneg21
Community Member

Hi Jake,

Thank you for the reply. I've gone through both articles and I'm still having the same issue. What I've discovered through my troubleshooting is that if I turn the "fan" setting on, whether manually or scheduled (e.g. run fan for an hour every day at 6pm), that works fine. In the current setup, the fan does in fact blow heat (I'm assuming because I have the thermostat set to the "heat" setting). However, if I try to activate the heat through either a scheduled temperature change and manually by adjusting the temperature on the thermostat, it's not kicking on (although the thermostat shows the temperature that I'm trying to set it to). Any suggestions? Thanks in advance for your help.