Repair or Buy Now and Save


Have a NEW Furnace or A/C installed now and get $100 OFF YOUR INSTALLATION!


Glossary of HVAC Terms

SEER Rating: The higher the SEER rating, the more efficient 
the unit operates & the more you will save on cooling bills!

Contact Us:

Office: 11509 W 121st Place, Cedar Lake, IN 46303-9767
Phone:(219) 374-9830

24-HOUR SERVICE: (708) 758-0588

Furnace Cleaning & Inspection Discount Offer
Trane Furnaces & Air Conditioners
Broan Heating & Cooling Systems

About Williamson Heating & Cooling Services, inc. of Northwest Indiana and the Surrounding Areas

Williamson Heating & Cooling Services, Inc. is an authorized HVAC contractor serving south Chicago townships, Northwest Indiana and the surrounding areas. Our industry trained HVAC contractors provide a variety of heating and cooling services for both  residential and commercial. Specializing in sales, service and installation of new heating and air conditioning equipment, our services include:

  • Repairs
  • Replacements
  • General maintenance
  • Expert installation on most models
  • Refrigerators, humidifiers and water heaters
  • Capable of servicing electronic air cleaners.

An outstanding reputation…
Over the 25+ years as a family owned and operated business, Williamson Heating & Cooling Services, inc. has earned an outstanding reputation for quality, service and value. Our friendly HVAC technicians are certified in heating and air conditioning repair and installation, sheet metal fabrication and air quality systems.

Why Williamson Heating & Cooling Services,inc.?
Serving the south suburbs of Chicago, Illinois and Northwest Indiana, since 1985
Certified and trained installers and service technicians
Licensed, bonded and insured
Senior citizen discounts are available
We’re available 24-hours a day for emergency services

Our History
Founded in 1985 by Don Williamson, Williamson Heating & Cooling Services started as a two-man heating and air conditioning residential sub-contractor. Over the years, Don’s reputation as a skilled, dependable and honest HVAC contractor attracted the attention of Chicagoland and Northwest Indiana local residents and business owners. Through word of mouth his service became popular amongst home contractors, developers, builders, home owners and businesses. Today, Williamson Heating & Cooling Services represents the needs of many commercial and residential HVAC customers throughout the Northwest Indiana and surrounding areas.

Satisfaction Guaranteed
You have our word- Our commitment is to our customers. We work hard to make sure our customers are completely satisfied with the products we offer and the services we provide. We Guarantee priority service for existing customers; no charge for parts per the manufacture’s written warranty; unlimited no-charge service calls for the first 12-months after installation by one of our Williamson Heating & Cooling Service technicians.