Intermittent heating issue

[DAR]

How can I tell if my intermittent gas heating issue is with my thermostat or my gas furnace? My cooling is working fine but the heating portion intermittently turns on and sometimes it won't turn on. I have no idea how to troubleshoot this intermittent heating issue any ideas?

[Patrick_Caezza]

@DAR 

Which Nest thermostat do you have, and how is it wired?

Is this a new install or one that was working before this?

[DAR]

Nest learning thermostat 3rd generation.  It's wired properly because the heating does work but it's intermittent.  I can usually get the heat to start up again by turning the thermostat off and on many times. It's not a new install.

[Jeff]

Hi DAR,

I wanted to see if you could do a quick test to see if there's a possible issue in the wiring or a connector. Could you swap the heat and cooling wires and run the cooling mode (since swapped, it will run heat) and see if it still has the same intermittent behavior?

Thanks,
Jeff

[DAR]

The problem was with my furnace circuit board. It was overheating and got partially burnt so I'm going to replace it tomorrow and I'm fairly sure that was what was causing this issue. I have replaced the circuit board and that solved the issue.  Do you have any idea why I can't delete my original post here?

[zoeuvre]

Hi folks, 

@DAR, thanks for posting here in the Community. How's it going with your Nest Thermostat and your newly installed circuit board? In case you have an update, let us know, and we'll be happy to help.

In regards to why you can't delete your post, this has been escalated, and we'll inform you once we get an update. For the meantime, please allow us to still work with this case. 
 

I appreciate the help, @Patrick_Caezza , @Jeff, and @Dianahemes. 

Best,

Zoe

[zoeuvre]

Hi everyone,

We haven’t heard from you so, I'll go ahead and lock this thread within 24 hours. If you run into any more issues in the future, please feel free to create a new thread.

Regards, 
Zoe