Certified by Williams Heating & Cooling • Aug 23, 2026
About
Certified by Williams Heating & Cooling • Aug 23, 2026
Air Conditioning ContractorHVAC ContractorHeating ContractorAir Quality Consultant
Heating and cooling repair and installation including heat pumps, mini splits, mobile homes and much more. We enjoy what we do and it shows through the quality of the finished product. Serving the Sullivan, Union, Washington, and St Clair MO area.
Location
Certified by Williams Heating & Cooling • Aug 23, 2026
Certified by Williams Heating & Cooling • Aug 23, 2026
Monday7:00 AM - 4:00 PM
Tuesday7:00 AM - 4:00 PM
Wednesday7:00 AM - 4:00 PM
Thursday7:00 AM - 4:00 PM
Friday7:00 AM - 4:00 PM
SaturdayClosed
SundayClosed
Reviews
4.5
48 reviews
5 stars
41
4 stars0
3 stars
1
2 stars0
1 star
6
CS
Charlotte Sappington
Jun 11, 2026
5.0
Williams Heating and Cooling is a great local business for your heating and cooling needs. They are pleasant to work with, quick to respond, and work through the issue even if it may not be a problem that directly involves their system. 5/5 would recommend this excellent business!
CR
Christopher Roley
May 18, 2026
5.0
A gentleman and a young woman gave me great team service today. They quickly diagnosed my furnace’s problem and clearly explained the situation and how to best proceed. I know Williams Heating and Cooling will fix my furnace correctly, they always do. Also, I’m a far drive for them and greatly appreciate them coming to service my home. I only use Williams Heating and Cooling.
NP
Nathaniel Prince
Apr 21, 2026
5.0
Williams is a company that backs their word and work. Each time I have called everyone I have talked to is very helpful and nice. Bridon the tech was nice and knowledgeable got the system back in order in no time! Will definitely call for any HVAC needs!
PB
Preston Burch
Apr 5, 2026
3.0
I am an hvac service technician/installer and I rent. Unless it’s an emergency, I do not work on the hvac system. I was having issues with my cooling, and Williams came out and was able to temporarily fix the system until they could replace it. The system was 30 years old and was showing all the signs of soon needing expensive repairs and risk things like freezing pipes, a cracked heat exchanger, or refrigerant leaking into the home. Williams recommended replacing it due to safety, age, condition, and cost of repairs. I agreed with their diagnosis. So did my property manager. There were no pushy sales. They replaced the hvac system and they did a good job. As of now the home heats and cools better than before.
SR
steve russom
May 14, 2024
5.0
Called first thing in the morning and had a technician at my door in about 30 minutes. Chase checked a couple things and the AC was up and running in less than 15 minutes. I couldn’t be happier with their service. Not to mention how nice everyone was! Thank you so much.
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Certified August 23, 2026Yext Knowledge Graph
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