Heating and cooling

Thermostat service

Thermostat repair and smart thermostat installation, including Nest and Ecobee setup.

Hand turning a round smart thermostat set to cool at 74 on a dark gray wall
Rated 4.81,000+ Google reviews
Same-day serviceWhen available
Licensed and insuredEPA certified HVAC technicians
Guaranteed workWe stand behind our repairs and parts

Common problems we fix

A thermostat that’s unresponsive or reads temperatures wrong throws off your whole system.

We repair existing thermostats and install new ones, including smart models like Nest and Ecobee, with full setup included.

Common signs and causes

  • For a new smart thermostat, we handle the wiring, the C-wire and system compatibility checks, and the setup.
  • Switching from a manual or basic programmable thermostat to a smart model is one of the easiest ways to improve comfort and cut energy costs.
  • Thermostat problems range from a blank screen or dead batteries to wiring faults and settings that no longer match the equipment.
  • Smart models also need a compatible power wire and system settings before they run the furnace and AC correctly.

Thermostat service questions

Can you install a Nest or Ecobee thermostat?

Yes, with the setup done. We check the wiring and the app connection so it controls the system properly.

What is a C-wire and do I need one?

A C-wire is the common wire that gives a thermostat steady power. Many smart thermostats need one, so its presence is checked before a new model goes on the wall.

My thermostat screen is blank. What should I try first?

Replace the batteries if it uses them and check that the furnace switch and breaker are on. If the screen stays dark, the issue may be wiring or the thermostat itself.

How much does thermostat service cost?

The diagnostic visit is $89, credited toward the repair cost. The price of the repair itself is set once the cause is known.

Book thermostat service

Call or book online and tell us which appliance or system needs attention. Have the brand and model handy if you can see the label.

Hours

  • Mon to Fri7 am to 10 pm
  • Sat7 am to 2 pm
  • SunClosed

Serving

Lake County, Cook County and nearby Chicagoland towns. See all towns

Request service

Pick a time online, or send your details and we'll follow up.

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