Your Expert Furnace & Air Conditioning Specialists in Collinsville, IL

Proudly Serving Madison County & the Surrounding Cities

Our Heating Services
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Our Cooling Services

Dependable Air Conditioning & Furnace Experts in Collinsville IL & the Surrounding Areas

Garrett Heating & Cooling has been providing quality and affordable HVAC services to residential clients for over 25 years in the Collinsville and Caseyville, IL area. Our team of experts takes pride in repairing your heating and cooling systems with the utmost efficiency so that you never have to spend money on additional repairs. Whether your air conditioning unit is blowing hot air, or your water heater is leaking, Garett Heating & Cooling is here to repair all HVAC brands, makes, and models to get your home running again! Every one of our repair, installation and maintenance services is available 24/7 when you need us most. What are you waiting for? Don’t let your failing heating and cooling systems disrupt your daily life, call us today and schedule an appointment or request emergency service. Our expert and certified technicians are dedicated to your complete satisfaction!

Financing Options
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Our Heating & Cooling Services
AC Repair
Is your AC unit blowing hot air? Has it stopped working entirely? Call on our experts to provide quality and affordable air conditioning repair services today.
AC Installation & Replacement
If your air conditioning unit is beyond repair, our technicians will remove your old AC unit and install a quality name brand system like American Standard.
Furnace Repair
When your furnace goes out, you can rely on Garrett Heating & Cooling to repair your gas or electric heating system in no time, all at an affordable price.
Furnace Installation & Replacement
When it’s time for your furnace to be replaced, our technicians are here to remove your old heating unit and replace it with one of the best heating systems on the market.
Boiler Installation & Replacement
Looking for a new way to efficiently heat your home? We provide boiler installation and replacement services for your home in the Collinsville, IL area.
Humidifiers & Dehumidifiers
Don’t settle for dry eyes are itchy skin due to poor air quality. Invest in a humidifier or dehumidifier installation service from Garett Heating & Cooling.
Learn More About Our Other Services

What Our Customers Are Saying

Customer service is our top priority, that’s why we strive to complete every job with the highest care and quality.

I was very pleased with the service that Garrett Heating & Cooling provided. They were super fast to respond, came the next day and it was worth every penny. They saved me a ton of money and answered every question I had. They took their time and provided me with wonderful service. I would highly recommend them for any / all of your heating and cooling needs. Kudos Garrett Heating & Cooling Team
Sharon B. Edwardsville, IL
Fast, efficient and took time as he went along explaining what he was looking at, why, and where the problem was. Fixed!
Erin H. Belleville, IL
Always came on time. very easy to work with. very reasonable rates. went out of their way to accommodate my situation.
Elizabeth S. Collinsville, IL
They did a very thorough job and their price for the cost of the repair on my furnace was very fair. Staff are friendly and knowledgeable; I would definitely use them in the future and refer them to other people.
Gail B. Belleville, IL
These guys are great! They went through the trouble of fixing my new wireless thermostat wiring, even though they could have just told me they were going to have to leave the old one on. They were friendly, COVID-conscious, and fast. They even cleaned my outside condenser unit when they were done, for free.
Steve O. Troy, IL
They were so wonderful with the family we were trying to help. I would highly recommend them.
Heather N. Granite City, IL
Friendly, informative, great work, good price. Made sure everything worked properly before leaving. Informed me of maintenance tips to prolong the life of my furnace. Excellent company!
Rebecca A. Belleville, IL
We initially called for HVAC service since we are new to the home. They came out and serviced it then returned when it couldn’t keep up on a hot day. It was evident the unit was not appropriately sized for the home. They gave us a fair quote and installed a new system quickly, even keeping the old system charged so I could then sell it intact.
Alex R. O Fallon, IL
Very responsive and quick service. I had them replace the furnace and AC in my house. They gave me a quote for a similar system, but I asked for pricing on a couple of options for more efficient systems. They answered all of my questions and gave me pricing on each option. I was very happy with the price, installation, and service they provided. They even came back a few days later and installed a smart thermostat I bought.
David C. Collinsville, IL

Why Hire Us?

Over 25 Years of Experience

With over 25 years of experience in the heating and cooling industry, you can rely on our team to complete every job right the first time, guaranteed!

Commitment to Quality

We never leave a job unfinished. Our team prides itself on conducting quality repairs, installation, and replacement HVAC services every single time.

24/7 Emergency Service

We offer 24/7 emergency heating and cooling services so that when your furnace or AC goes out in the middle of the night, our technicians will be there.

Competitive Pricing

Our competitive pricing is like none of our competitors in the area. We never overprice our services and always try to get you the best deal on your HVAC repairs.

Certified Technicians

Every one of our HVAC technicians is certified, licensed, and experienced in all areas of our heating and cooling repairs so that you always get the best service.

Free Estimates

Want to plan for your next HVAC service? We offer free estimates on all of our furnace and air conditioning services so that you are always prepared.

Request a Service

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About Our Company

Our company has over 25 years of experience in the heating and cooling industry, providing expert HVAC repairs and installation services to homeowners throughout the Collinsville, IL area. As a family-owned and operated business, our team of certified technicians is dedicated to quality customer services. That’s why we treat your home like it’s our own, and only work with the top name brands in the industry to give you products that will last for decades to come. We treat our customers like family, which is why our customers have always called us when their heating or cooling systems are experiencing problems. You can rely on Garrett Heating & Cooling to provide expert repairs on all of your HVAC brands, makes, and models. Get a free estimate or 24/7 emergency repair services when you call our shop today!

Financing Options
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Cities We Serve

  • Belleville, IL
  • Caseyville, IL
  • Collinsville, IL
  • Edwardsville, IL
  • Fairview Heights, IL
  • Glen Carbon, IL
  • Granite City, IL
  • Maryville, IL
  • Mascoutah, IL
  • O’Fallon, IL
  • Shiloh, IL
  • Swansea, IL
  • Troy, IL
  • Wood River, IL
  • And the Surrounding Areas!