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HVAC FitterTHE PART THAT FITS

Thermostats

Pick a thermostat that works with your system. Count the wires at your old one and note if you have a heat pump.

  1. 1System: gas, electric or heat pump, as listed
  2. 2Stages: heat and cool stages your system uses
  3. 3C wire: needed by some models, check yours

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19 parts
Numbers rubbed off your old part?

Send us your unit's model number and a photo of the plate. A real person will find the part for you.

Ask us to find it

24 V or line voltage

Most central systems use 24 V thermostats. Baseboard heaters use line voltage. They are not the same. Check before you buy.

Take a photo first

Before you pull the old one off the wall, take a photo of which wire goes to which letter.

Turn off power

Shut off the furnace or air handler at its switch or breaker before you change wires. Read the guide.