CRS Heating and Air Conditioning, Inc.
CRS Heating and Air Conditioning, Inc.
  • Home
  • Air Conditioning
    • Air Conditioning
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    • Ductless AC
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  • Heating
    • Heating
    • Emergency Heating Repair
    • Furnace Repair
    • Furnace Installation
    • Boiler Repair
    • Boiler Installation
    • Heat Pump Repair
    • Heat Pump Installation
    • Heating Maintenance
    • Garage Heaters
    • Thermostats
  • Indoor Air Quality
  • Preventive Maintenance
  • FAQs
  • Blog
  • More
    • Home
    • Air Conditioning
      • Air Conditioning
      • AC Repair
      • AC Installation
      • AC Maintenance
      • High Velocity HVAC
      • Ductless AC
      • Thermostats
    • Heating
      • Heating
      • Emergency Heating Repair
      • Furnace Repair
      • Furnace Installation
      • Boiler Repair
      • Boiler Installation
      • Heat Pump Repair
      • Heat Pump Installation
      • Heating Maintenance
      • Garage Heaters
      • Thermostats
    • Indoor Air Quality
    • Preventive Maintenance
    • FAQs
    • Blog
(630) 940-9155
  • Home
  • Air Conditioning
    • Air Conditioning
    • AC Repair
    • AC Installation
    • AC Maintenance
    • High Velocity HVAC
    • Ductless AC
    • Thermostats
  • Heating
    • Heating
    • Emergency Heating Repair
    • Furnace Repair
    • Furnace Installation
    • Boiler Repair
    • Boiler Installation
    • Heat Pump Repair
    • Heat Pump Installation
    • Heating Maintenance
    • Garage Heaters
    • Thermostats
  • Indoor Air Quality
  • Preventive Maintenance
  • FAQs
  • Blog
(630) 940-9155

Thermostat Repair & Replacement for Heating Systems

 Accurate Control for Reliable Warmth 

When the Thermostat’s Off, the Heat Doesn’t Feel Right

Your thermostat is the command center for your heating system — and when it’s inaccurate, outdated, or malfunctioning, your home never feels quite right. CRS Heating and Air Conditioning, Inc. repairs and replaces thermostats for furnaces, boilers, and heat pumps. Whether you need basic troubleshooting or want to upgrade to a smart model, we’re here to help. 

Common Thermostat Issues in Winter

If your heat won’t kick on — or keeps turning on and off too frequently — your thermostat may be the cause. Inconsistent temperatures, unresponsive screens, and rooms that never seem to get warm enough often point back to a control issue.


We’ll test system communication, wiring, settings, and power supply to confirm what’s happening.

What We Service

Standard programmable and manual thermostats

Thermostats for furnaces, boilers, and dual-fuel heat pump setups

Thermostats for furnaces, boilers, and dual-fuel heat pump setups

Thermostats for furnaces, boilers, and dual-fuel heat pump setups

Thermostats for furnaces, boilers, and dual-fuel heat pump setups

Thermostats for furnaces, boilers, and dual-fuel heat pump setups

Smart thermostats from brands like Nest, ecobee, and Honeywell

Thermostats for furnaces, boilers, and dual-fuel heat pump setups

Smart thermostats from brands like Nest, ecobee, and Honeywell

Zoned system control panels

Compatibility checks during system replacements

Smart thermostats from brands like Nest, ecobee, and Honeywell

Temperature misread issues or frozen displays

Compatibility checks during system replacements

Compatibility checks during system replacements

Compatibility checks during system replacements

Compatibility checks during system replacements

Compatibility checks during system replacements

Why Upgrade to a Smart Thermostat?

Smart thermostats can adapt to your routines, save on energy bills, and keep your home comfortable in every season. You can set schedules, control settings from your phone, and monitor usage — all without needing to adjust the dial every time the weather changes.


We’ll help you choose a model that works with your system and install it cleanly with no guesswork.

Local, Trusted Service

CRS is woman-owned, based in McHenry, and committed to getting the details right — including the part of your system you interact with every day. We won’t upsell what you don’t need. We just make sure your heat runs the way it should.

Schedule Thermostat Service or Upgrade

Call (630) 940-9155 or use the form to request a thermostat service call or smart upgrade.

 We’ll help you take control of your comfort — and make sure your system listens. 

Upgrade Now

CRS Heating and Air Conditioning, Inc.

Woman Owned & Operated in McHenry, IL

(630) 940-9155


Copyright © 2025 CRS Heating and Air 

Conditioning, Inc. - All Rights Reserved.

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