Nest Thermostat E Installation Without C Wire

If your current thermostat has a wire in the c terminal.

Nest thermostat e installation without c wire.

I have an older boiler system with two wires running from the aquastat to the old thermostat. The sensi wi fi smart programmable thermostat 1f86u 42wf works very well without a c wire. These illustrations use the 3rd gen nest learning thermostat but the steps are the same for the nest thermostat e. The nest app won t tell you to connect one do not connect a c wire to your nest thermostat unless the nest app tells you to.

If your current thermostat doesn t have a wire in the c terminal. If you re going from an older thermostat to a new smart one you may find that your system is without a c wire. You can print it or email it to yourself. I m going to install the nest e thermostat but want to add a third wire to serve as a c wire.

Other thermostats like the ecobee come with an adapter that can be used if you already have four wires but no common wire ecobee thermostats are also discussed below. Begin installation with the app the nest app s step by step instructions make it easy to install and wire your thermostat so use it as your main guide. The nest learning 2 nd generation also claims to be able to work without a c wire as it borrows the power from the d and g wire. Use the compatibility checker.

For instance the nest thermostat and the nest e thermostat can usually run without a common wire see below for more information. The wiring diagram that you ll get from the nest app will tell you to connect the c wire to your nest thermostat. The nest thermostat e works with most 24v systems including forced air variable speed heat pump and radiant systems as well as. You don t need a c wire take your fan wire and wire it to c on the nest then move fan from the furnace controll.

Remove any jumper wires. We ll walk you through the entire process of installing your thermostat in the right spot and you ll f. The nest thermostat e is simple to set up and install. If that s the case you can install one pay to have one installed or simply grab.

How to tell if you have a c wire.