Heating and Cooling Repair

Breathe Easy with our HVAC Solutions!

Furnace Repair? Heater Problem? Need a new Furnance?

Call today for a FREE Estimate

Serving colorado for 15 years

Our Specials

Call to take advantage of our low prices and special deals!




Questions? Call us today for more details on all our specials and what we can do for you!

Why choose McCormick?

We've spent the last 15 years building our business through honest practices and the best value in the HVAC industry.
When you work with McCormick Heating & Cooling you can be sure you're getting the highest quality of service, an honest assessment of your needs, and the right equipment for your home.

Competitive Pricing

We pride ourselves in offering the best HVAC equipment, from the best manufacturers, available at the most competitive pricing in Northern Colorado.

24 Hour Emergency

Furnaces and Air Conditioning units seldom fail at convenient times. Call us when the need arises and we'll take care of you, 24 hours a day 365 days a year.

Qualified Experts

With more than 15 years of experience, we've seen it all and done it all. We will educate you on the best solution and options for your unique situation.

We're committed to your job!

Heating and Air Conditioning repair done right

For more than 15 years, McCormick Heating & Cooling has been providing furnace and air conditioning repairs and installation services to Platteville, Longmont, Greeley, Fort Collins and the surrounding areas. We guarantee your satisfaction on all of our A/C and furnace repair and replacement services. If you are unsatisfied for any reason, please give us a call and one of our qualified techs will come back and see what we can do to meet your needs. McCormick Heating & Cooling is locally owned and operated and we pride ourselves on our honest quotes and competitive rates. We provide exceptional customer care on all of our AC, furnace, and boiler repairs and installations.

Whether you need residential or commercial heating and air conditioning repair or installation services, call McCormick Heating & Cooling. We are the leading HVAC furnace repair and installation service providers in Northern Colorado.

HVAC Services

residential & commercial Heating & Cooling



AC Units


  • Garage/Tube Heaters
  • Heat Pumps
  • Humidifiers
  • Forced Air Furnaces
  • Gas Furnaces
  • Electric Furnaces
  • High Efficiency Furnaces
  • Mini Splits
  • Duct Work Installation
  • New Construction
  • Remodel Construction
  • Basement Finish
  • Duct Work
  • Garage Heaters
  • Gas Lines
  • Dryer Vents

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Customer Testimonials

"When Nick came to our house to install our boiler unit, he was professional, knowledgeable, courteous, and his work was neat and precise. Any contact that we had with the main office was enjoyable and informative. We would highly recommend McCormick for any work to be completed, whether if would be a small or large project."I wanted a second opinion on my furnace, so I called them. This company is the most professional contracting company I have had at my house. The tech knew what he was doing, and he explained everything and even told me how to prevent future problems to save me from potential costly repairs. Highly recommend.
J. Johnson
"Jesse and Nick were amazing. They tried everything to get our unit running with the simple inexpensive fixes first. Unfortunately our units are just too old (which I knew they were), so Nick and Jesse have installed new AC and furnace. The house air movement feels amazing considering we haven't had it on these hot days. And now for winter I know we will be safe and warm. They were professional and took care to get the job done right. I would recommend these guys any day of the week! "
A. Grives
"We had our heater go out in the middle of the night, we call the next morning and McCormick came out to our home within and hour! The service was first class! We recommend McCormick AC and heating with 5 starts! Thanks for taking care of us."Our furnace was really old and too costly to keep repairing, so I called for an estimate on a new unit. They came out for free and gave me a great price on a new system. Their service guy explained the process and details clearly. There were no unexpected charges; they completed the work the same week, and done in only a few hours. New system runs perfectly couldn't ask for a better company."
J. Eurich

What Separates Us

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Jobs Completed
Years in Business