04-24-2024 09:24 AM
Hi there,
I have installed a new 3rd generation learning thermostat at my cottage a month ago and it has been giving me E79: no power to wire C after each power outage (we have had 2 of them in the past month) it has been very frustrating since the cottage is couple of hours away and I need to make the trip to reset the thermostat. I have been using nest thermostat at my house for more that 3 years and never had an issue after power outage. How can I resolve this?
04-27-2024 11:27 AM
Hi VRHRM,
Thank you for posting in this community. I understand the inconvenience that you are having, but don’t worry I'm here to assist you. Of course E79 error code on your Nest thermostat indicates that it's not receiving continuous power, which is typically provided by the C wire. Here are some solutions you can try to resolve this issue:
If the inconvenience persists, you can contact professional assistance.
Regards,
Daniel