Quote:
Originally Posted by Hemi-Cuda
Furnace is acting weird for the last week or so. 3 times now I've noticed it cold in the house, I check the thermostat (Nest), and it says it's currently heating but the furnace is completely inactive. If I go down and cycle the power to it, then it fires up and starts the heat cycle and works normally for a few days. Seems like for whatever reason the signal to start heating doesn't reach the furnace intermittently. I thought the Nest might be ####ting the bed with Google discontinuing it, but it's still working fine in my Home app and I have no trouble setting the temperature manually on it. Aside from the thermostat itself, would there be any other causes for something like this?
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I've had that happen to me a few times in the past. In my case, there is a sensor in the furnace flame (looks like a thick wire) that can get coated with carbon over time. I take some sandpaper to it, and it solved the issue.
Hoping that's it as it's an easy diy fix.