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heat turns off and on non stop

Community Member

Heat will run for 59sec (as says on the system log) and turns off for a split sec then on again. You can hardly can catch that it turned off, it turns back on so fast. I looked at many reviews and they mention a common wire but I already have that. Please help.  It's getting cold! 


Community Member

I'm having this same issue, Google can never seem to figure out what the problem is.  Good luck.

Hello folks,

Thank you for taking the time to let us know about your inquiry. I'd be happy to take a look at this.

It seems like your heating system is cycling on and off rapidly, even though you have a common wire connected. This issue could be caused by various factors, such as a faulty thermostat, a problem with the heating system itself, or issues with the wiring. To troubleshoot, consider checking the thermostat settings, inspecting the wiring for any loose connections, and ensuring that the heating system is functioning properly. Also, please gather the power readings in the Technical Info settings or in the Equipment settings, depending on the Nest Thermostat versions you have.

Keep me posted.


Good evening.  I currently have my Nest disconnected but I will reinstall it tomorrow and get those readings.  I'll follow up then.

Hello, I was able to get readings this morning.  They are as follows:



Iin: 385



This is also how the unit is wired.PXL_20231203_132826420.jpg.

Keep in mind I live in an apartment, so although they don't mind if I have the Nest installed, maintenance refuses to do any work if the stock thermostat is not installed.

Community Specialist
Community Specialist

Hi folks,


Thanks for chiming in, Mark. 


@CheapCChair, thanks for getting back to us, and I appreciate you following the instructions from Mark. I don't see anything wrong with the power readouts of your Nest Thermostat. Check your air filter, as a clogged filter might cause a similar symptom. If the air filter is dirty and needs to be changed, replace the air filter and let us know if the issue continues after they change the filter. Refer to the Air filters and filter reminders article for more details. 




I can assure you it's not the air filter. First off my air filter gets replaced regularly. Second, this does not occur with the stock thermostat. There's clearly an issue with the Nest. 

Community Specialist
Community Specialist

Hi CheapCChair, 


I see. Don't give up on us yet—we'd like to further check on this. Could you fill out this form and let me know once you're done?




I already filled out a similar form and didn't hear back yet. 

Hello again,

We truly apologize if this is taking longer than expected to get resolved. I want to thank you for your patience while we work this matter out. I will follow up on your case with our team, and I'll get back to you as soon as I receive an update.


Hello CheapCChair,


I know it has been a while, but I wanted to ensure that everything was covered here. 

Let me know if you need anything from us, but I am just seeing how the conversation is going via email with our senior support. So please continue the conversation there and feel free to create a new thread for any future questions or concerns—we're here to help!

Warm regards,