Outstanding Installing A Common Wire For Nest
Get a c wire or install an adapter if you want a nest.
Installing a common wire for nest. Basically you have two options if you want to ensure your nest installation is solid. 2 instead of going with another nest. But in a small number of situations you may need to connect a common or c wire to deliver enough.
In most cases nest thermostats can get enough power from your system s heating and cooling wires. Run new wires between your furnace and your thermostat hire a pro or diy with a new spool of thermostat wire grab a venstar add a wire which adds a 5th wire to an existing 4 wire setup. Take a picture of the wiring.
Turn off the hvac system and disconnect the nest thermostat from it s base. Nest thermostat no common wire nest thermostat needs no common wire problem solved how to connect the nest thermostat without a common wire. One of the m.
Nest common wire installation use the fan wire as a c wire. I wound up switching to honeywell s rth9580 wi fi thermostat fig.