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Heater turns on and off several times

Min
Community Member

When the temperature falls down, the heater turns on. However, the heater turns off after a minute or so, and then almost immediately turns on again. The heater does it 2-3 times before it stays on to reach the desired temperature. What could be the issue here?

7 REPLIES 7

Fletcher
Community Member

I have this same issue, with both of my Nests, on 2 separate heating units. These are new Nest thermostats, and it doesn't happen all the time. 

Min
Community Member

Me, too. It doesn’t always do that so its really difficult to analyze whats wrong and I’m hesitant to call HVAC technician since it happens maybe 1 out of 4 times… Did you resolve it by any chance?

Fletcher
Community Member

No... still an issue and I had an HVAC guy out and he couldn't figure it out either, everything is wired properly and the heater is functioning properly too. I have two furnaces, and 2 new Nests. Both Nests do this, with both furnaces. This did not occur with the prior thermostats. Frustrating as I've wasted about $550 on worthless thermostats from Nest.

Jake
Community Specialist
Community Specialist

Hey all,

 

Sorry for the late reply. I wanted to follow up and ensure you are good to go. 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

sethman900
Community Member

Could be driven by the Aquastat that controls off/on if it's a hyrdo coil

ez2remember
Community Member

Having the exact same issue ... system has a C wire. Had HVAC person out and he said to trash the Nest. He connected a Honeywell and showed it started up on first try.  Is there a way to fix this or should I really trash the Nest?

Beuby918
Community Member

I had HVAC repair out last fall…he ‘fixed’ it but said he didn’t like Nest:  I do like best!  Still getting warning from Nest.  I wonder if it is doing this when the temp is ‘close’ to setting and doesn’t require much heater intervention, so it keeps bumping the heat.  I don’t want to pay for another trip from HVAC for the same issue!