About Us

Cedar Lake, St John, Lowell Area HEATING & AIR CONDITIONING SERVICES | INDIANA & ILLINOIS

An authorized Heating & Air Conditioning contractor, Williamson Heating and Cooling Services, Inc.  serves the South Chicago suburbs, Northwest Indiana, and surrounding areas. As an industry trained HVAC contractor, we provide a full-range of services in both heating and cooling for residential and commercial customers. We specialize in the service, sales, installation, repair and routine service of air conditioning, heating, water heater & indoor air quality equipment.  This includes furnaces, air conditioners, UV lights, air purifiers, water heaters, boilers & more!
Learn more about our services now.

OUR HISTORY

Williamson Heating and Cooling Services, Inc. was founded by Donald Williamson in 1985. Starting off as a two-man team, Donald quickly grew the locally owned and operated company, attracting the attention of residents in Chicagoland and Northwest Indiana. Known for his skill, dependability, and honest nature, Donald continued to grow the company in to what we know today. Through word of mouth we have been able to serve the residents and business owners of Indiana and Illinois with the best in commercial and residential HVAC services.

SATISFACTION GUARANTEED

Our word is our commitment and our customers always have our word. In order to provide a customer satisfaction guarantee, we provide the best products and services to meet the needs of all of our clients.
HVAC - HVAC Contractor in Cedar Lake IN

WHY CHOOSE US?

  • Family Owned and Operated
  • Licensed, Insured, and Bonded
  • 24 Hour Emergency Services Available
  • Northwest Indiana's Most Trusted HVAC Contractor
  • We Service a 50 Mile Radius of Cedar Lake
  • Affordable Rates
  • Immediate Service in Lake, Will, and Cook County Areas
  • Free Estimates on New Furnace and Air Conditioner Installs
  • Special Offers Available

“ Williamson Heating came out on a Sunday. We began having other problems after another heating company had put in a replacement part. The problem of loud hissing and flames blowing out of the furnace were corrected, other questions we had even about our thermostat were answered. We consider the service to be excellent and the price for a Sunday call was very fair. They will be our “go to” company from now on. ”


James C.

– 2/15/2015

“ Been using these guys for several years now always on time and affordable I will refer to anyone and everyone. Thanks Don ”


Luigi B. Jr.

– 2/18/2015

“ Excellent customer service, great communication, and cleanliness make Williamson a good choice. Highly recommended for your heating and cooling needs! ”


Robert B.

– 7/15/2015

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