I am trying to install a NEST Thermostat, it is asking for a C Wire. there is no place for a C wire

wbfmaria — Wed, 06 Sep 2023 16:46:42 GMT

I am trying to install a NEST Thermostat, it is asking for a C Wire. there is no place for a C wire. We have an old thermostat, and there is no place to put a C wire. Please help.

Re: I am trying to install a NEST Thermostat, it is asking for a C Wire. there is no place for a C

David_K — Sat, 09 Sep 2023 14:28:21 GMT

Nest thermostats are designed to use very little power, and in many cases they can use your system’s heating and cooling wires to get enough consistent power. But sometimes, you may need to connect a common wire (C wire) or power accessory, and the app is telling you this is the case to make your system compatible with Nest Thermostat.

It sounds like you've already checked, but look at which wires are connected on your system’s control board to see if any of them are connected to the system’s C terminal. If so, you can put the other end of that wire in your Nest thermostat’s C connector.

If there isn’t a wire in the system board’s C terminal, you need to install the Nest Power Connector or have a local HVAC professional, install the power connector or a C wire for you.

topic I am trying to install a NEST Thermostat, it is asking for a C Wire. there is no place for a C wire in Nest Thermostats

I am trying to install a NEST Thermostat, it is asking for a C Wire. there is no place for a C wire

Re: I am trying to install a NEST Thermostat, it is asking for a C Wire. there is no place for a C