How much does thermostat installation cost?
Swapping a thermostat is a short job when the wiring is simple. Most of the price is the tech's visit and about an hour of work. The thermostat itself is usually extra, so you can buy the model you want and pay only for installation, or have the tech supply one.
Thermostat installation prices at a glance
| Job | Newer pro | Experienced pro |
|---|---|---|
| Install 1 thermostat, labor | $105 | $220 |
| Install 2 thermostats, 2 systems | $190 | $375 |
| Install 1 thermostat, evening or weekend | $215 | $380 |
Labor and basic supplies. Big parts or appliances you buy yourself are extra. Prices run higher in big cities.
Do it yourself or hire a pro?
Many people install their own thermostat. Turn off power to the HVAC system first, take a photo of the old wiring, and check the new model's compatibility tool before you buy. Call a pro if you have no C-wire, thick high-voltage wires, a heat pump or more wires than the new thermostat has terminals.
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What's usually included
- Power to the HVAC system shut off and the old thermostat removed
- Wires labeled and connected to the new thermostat
- New thermostat mounted and leveled, with a wall plate if needed
- Heating, cooling and fan tested from the new thermostat
- Basic setup, like schedule and Wi-Fi, if it is a smart model
What changes the price
- Wiring. Many smart thermostats need a C-wire for steady power. If you do not have one, the tech may add a wire or an adapter.
- System type. Heat pumps, two-stage systems and dual-fuel setups have more wires and settings.
- Number of thermostats. Each zone or system needs its own.
- The thermostat. Basic programmable models cost far less than smart ones, and the unit is usually not included in the labor price.
Common questions
What is a C-wire and do I need one?
The C-wire, or common wire, gives a thermostat steady power. Many smart thermostats need one. Look behind your current thermostat to see if a wire is connected to the C terminal.
Can a smart thermostat lower my bills?
It can help if it keeps your home from heating or cooling while you are away or asleep. How much you save depends on your habits and climate.
Does a thermostat need to be installed by a licensed pro?
Rules vary by state and city. Low-voltage thermostat swaps are often allowed for homeowners, but line-voltage thermostats for electric heat may require an electrician.
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