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
Product Services

Williamson Heating & Cooling Providing Northwest Indiana & the Greater Chicagoland area with Affordable Heating & Cooling Services.

Filtration, humidifiers, UV

Gas, Electric, Radiant, Heat pumpsWayne Truck

Air Conditioning – Standard central air & air cooling equipment

Maintenance Service

24 hour Service

Our Preventative  Maintenance Service

Regular tune-ups not only saves you money by extending your HVAC equipment life but also keeps your heating, cooling and air filtration products working efficiently. Our knowledgeable staff will help you select the Preventative Maintenance program that is best for your home or business.

New Installations

We are available for NEW Construction & Existing Residence Installations. We can help you make an informed purchase by guiding you through the maze of HVAC equipment on the market including furnaces, air conditioners, air purification, humidifiers and air handlers.  In the past few years there have been significant advances in heating, cooling and air filtration technology and we have done our job of staying educated and certified. If your HVAC system is more than 10 years old, you may want to consider installing a new HVAC system to obtain the ultimate in comfort and health while reducing your on-going energy costs.

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.

  • Northwest Indiana’s Most Trusted HVAC Contractor
  • Affordable Rates, immediate service in the Lake County, Will County & Cook County areas.
  • Free Estimates on New Furnace and Air Conditioner Installs
  • Licensed, Bonded & Insured
  • Family Owned & operated
  • 24 Hour Emergency Service