About Us

Schedule Service – (708) 403-3434

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Comfort Zone Service Truckcommercial rooftop unit replacement

Chicago’s Most Affordable & Reliable Expert HVAC Repair Service for over 25 Years!
Serving the Entire Area of Chicago and Surrounding Suburbs

Comfort Zone Heating and Cooling provides the highest quality and most affordable heating repair and air conditioning repair in Chicago and surrounding areas. Our expert repair technicians repair all makes and models of major HVAC equipment including: Aaon, Carrier, Trane, York, Lennox, American Standard, Bryant, Payne, Luxaire, Armstrong, Goodman, Tappan, Rheem, Westinghouse, and more! We repair both commercial and residential HVAC equipment.

Comfort Zone Repairs All Brands

Instant dispatch means sudden service! You get help in a hurry

  • 24 Hour emergency service
  • Quick response
  • Quick, fast, clean, courteous service
  • Radio dispatched
  • Qualified trained technicians
  • No such thing as “a job to small”
  • Service response around your schedule, not ours


Warehouse on wheels for One-Stop service

Our warehouse on wheels carries a full line of inventory including all parts to complete your job.  This means no waiting for parts, just the prompt service and repair you deserve.

Air Conditioner Charging Gauges

Superheat and Subcooling A refrigerant undercharge of only 10% can increase operating costs by almost 20%. Which is why Comfort Zone uses state of the art gauges, delivering the most accurate charge available. We first determine a temperate drop across your cooling coil, then deliverer a 100% accurate charge utilizing superheat and subcooling temperatures.



Refrigerant Leak Detector

Leak Detection Refrigerant should never need to be replaced. If it must be added every year, there is an expensive leak that should be repaired. Comfort Zone has state of art leak detection equipment. Combining sensitive sensor technology and ultra violet leak detection dye, we are able to find and repair undetectable leaks.




Our Service Technicians are dedicated to leaving your home just the way they found it.  So, before beginning any repair job, they spread the red carpet to protect the work sight.  Special consideration for our customers – just one of the things that makes Comfort Zone unique.

We have the equipment and expertise to handle all you’re heating and cooling needs

Services include the following: Residential, Commercial, Industrial

  • 24 Hour Emergency Repair Service
  • Acid Testing & Cleaning
  • Air Conditioning
  • Air Driers
  • Bearings
  • Blower Coil Units
  • Boiler Reset
  • Boiler Tear-down & Cleaning
  • Boilers
  • Cabinet Units
  • Coil Repairs
  • Combustion Analysis
  • Compressed Air Systems
  • Compressor Repair & Replacement
  • Computer Room Services
  • Control Service & Renovation
  • Convenience Outlets
  • Cooling Towers
  • Design & Build Specialty Construction
  • Direct Digital Control
  • Door Heaters
  • Dryer Duct Cleanout
  • Duct Furnaces
  • Economizers
  • Emergency Power Back-up
  • Energy Analysis
  • Equipment, Check, Test & Start-up
  • Equipment Termination & Relocation
  • Exhaust & Ventilation Systems
  • Exhaust Fans & Ceiling Fans
  • Expansion Tanks
  • Filters & Belts
  • Full Maintenance Programs
  • Heat Exchangers
  • Heat Pumps
  • Heating
  • Humidifiers & Dehumidifiers
  • HVAC Units – New Construction & Retrofit
  • Indoor Air Quality
  • Infrared Heaters
  • Labor Only Programs
  • Maintenance Recommendations
  • Make-up Air Units
  • Motors, Actuators, VAV Boxes
  • Multi Zone Units
  • Noise Reduction
  • Phase & Voltage Protection
  • Piping Systems & Repair
  • Pneumatics
  • Power Burners
  • Power Washing
  • Preventive Maintenance Programs
  • Programmable Thermostats
  • Pump Rebuild
  • Pump Repair & Replacement
  • Service Existing Equipment
  • Steam Traps
  • System Analysis
  • Systems Termination & Relocation
  • Tower Rebuild
  • Tube Bundles
  • Water Heaters
  • Window Units