cancel
Showing results for 
Search instead for 
Did you mean: 
Replies are disabled for this topic. Start a new one or visit our Help Center.

No RC Power to thermostat

gplevritis
Community Member

Noticing that my boiler is shutting off after three minutes of use and then just turns back on. When looking at my nest thermostat, I can see during the times that it shuts off that is shows the error for no power to rc wire. Then after about three minutes, the boiler turns back on and the error message is gone.  Is this because as the boiler is running it is detecting some issue and needs to shut down as well as shutting off the rc power to my nest thermostat.

1 REPLY 1

KD59
Community Member

I am having the same problem. Have power to my boiler but I am getting an E74 message - No power to thermostat. Hope that someone can respond. I am seeing a number of people that are having the same issue.