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Tag: Thermostat C Wire


NEST Thermostat Functioning Well after Wiring Change

Posted by Shaun Merrigan in NEST Thermostat, News, Tech. Comments Off on NEST Thermostat Functioning Well after Wiring Change

16th March

NEST Thermostat Functioning Well after Wiring Change:

Over a month on since I changed my NEST v1 thermostat wiring to include the “C” or 24Vac Common wire, it is working flawlessly again. We have had several cycles of cold (-20C) and warm (+8C) and there have been no problems with charge levels, network communication or connectivity.

I wonder why NEST does not strongly recommend the use of the “C” wire when it is so simple to install? BTW, if you are looking for a wiring diagram of your furnace and controller, check the back side of the access panel (Doh!!) on the furnace; it should be there.

I have e found a couple of very useful links for anyone in a similar situation and seeking a solution:

Adding a C wire to a Thermostat

When-Nest-needs-a-common-C-wire

Shaun M