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An HVAC Company You Can Trust

Just Ask Our Customers

    
 
 
      Trustindex verifies that the original source of the review is Google. McCormick’s came through again with Justin doing a great job for us. We had furnace and A/C maintenance done at our new house to make sure everything was working properly. A couple of issues were found and Justin had them fixed within a couple of hours. Now we have peace of mind about our HVAC system. Highly recommend McCormick’s!
  
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   Mary P. 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Angelo is a fantastic worker, he was very helpful and made things easier.
  
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   miskokittagakoonsekwe 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Angelo was very knowledgeable and helpful. Would definitely use this company again!
  
  Posted on Google  
 
    
   Lilyana Palafox 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Spencer was great! He solved our gas leaks very quickly.
  
  Posted on Google  
 
    
   J Stark 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Justin provided excellent service during our fall furnace checkup. Justin was very friendly and courteous. Treated our home and us with much respect.
  
  Posted on Google  
 
    
   Kevin Vaubel 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Spencer did really great
  
  Posted on Google  
 
    
   Justin Shaver 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Justin gave fantastic service. Was quick and responsive. Thank you McCormick services for a rapid repair.
  
  Posted on Google  
 
    
   Ethan Stein 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. Justin was friendly, communicative, and efficient. Would definitely hire him again.
  
  Posted on Google  
 
    
   Michelle Brodsky 
 
 
 
 
     Trustindex verifies that the original source of the review is Google. McCormick was very quick and responsive when I reached out about a furnace concern. They got me scheduled same day and Justin showed up on time and was very thorough and professional. He walked me through the service and made sure everything was functioning properly. Great company and great staff!
  
  Posted on Google  
 
    
   Samantha Bellendir 
 
 
 
 
  
  
 
 
      Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Years of Service

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...and counting!

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McCormick is a Trusted Armstrong Air Partner

Voted Best HVAC & Furnace Repair Service in Greeley, Colorado

Voted Best HVAC & Furnace Repair Service in Fort Collins, Colorado

McCormick Heating and Cooling is a BBB Accredited Business

Our HVAC Techs are NATE Certified Technicians

Our company is Google Guaranteed Service Provider

Quality HVAC Work, Backed By Experience

At McCormick, we truly care about the __ community. Which is why are dedicated to giving you straightforward recommendations, reliable repairs, and the right equipment for your home - nothing more, nothing less. Our NATE and EPA-certified technicians are trained to service all types of HVAC systems, whether it's an older furnace or a new high-efficiency setup. We stand by the work we do, from heating repairs to full system installs and everything in-between...that's the McCormick way.

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HVAC Repairs in Arvada, CO

Located Northwest of Denver, Arvada has a rich history and a growing population over the years. According to the City of Arvada, Arvada was once known as the “Celery Capital of the World” and was the site of the first gold strike in Colorado. Today, more than 100,000 people call Arvada home, and it is filled with great trails to hike. We are proud to offer quality HVAC repair services to those that live and work in Arvada.

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Our team offers 24/7 Emergency HVAC Services for all residents of Northern Colorado! Call our number after-hours to speak with our emergency technician!

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Nest Thermostat Installation in Colorado Home

Steam Humidifier Installed in Lafayette Home

AC Installation in Loveland Colorado Winter

New AC Installation in Fort Collins Colorado

Goodman HVAC System under Colorado stairs

AC Installation Job in Loveland Colorado

Furnace Installation Fort Collins Colorado

New Furnace Installation in Windsor Colorado

Furnace Installation in Northern Colorado

Mini Split Installation in Denver Colorado

Goodman Furnace Installation in Colorado

Furnace Installation in Platteville Colorado

Furnace Installation in Louisville Colorado

Furnace Installed in Northern Colorado Home

Furnace Installation in Loveland Colorado

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The Team Behind Greeley's Best HVAC Company

Our team is what sets us apart. With decades of combined experience and a shared commitment to customer care, McCormick is proud to be the trusted choice for HVAC services in Greeley and Northern Colorado.

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Is your unit breaking down too often? It may be time to think about a new HVAC unit!

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In an HVAC emergency?? McCormick offers after-hours repairs.

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McCormick Heating & Cooling provides reliable heating, cooling, and indoor air quality solutions for homes and businesses across Northern Colorado. From installations and repairs to routine maintenance, our experienced HVAC team is dedicated to keeping your space comfortable year-round. Whether you need help with furnaces, air conditioners, or air quality improvements, we’re here to deliver expert services you can trust.

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Repairs, Installations, and Maintenance Services

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Read the Latest News and Updates From the HVAC Industry

Blog cover for a Greeley guide explaining 5 common causes of a high-efficiency furnace leaking water

Furnace Leaking Water? 5 Condensate Causes (Greeley Homeowner Guide, 2026)

By Jesse Trout | October 8, 2026

The Ultimate Fall HVAC Maintenance Checklist for Longmont, CO Homeowners

By Jesse Trout | September 24, 2026

Featured article image for furnace short cycling causes and fast heating repair fixes in Loveland, CO

Furnace Short Cycling: Causes & Fixes | Loveland, CO

By Jesse Trout | September 17, 2026

Featured article image explaining 6 reasons why you have a furnace blowing cold air in Fort Collins

Furnace Blowing Cold Air? 6 Causes | Fort Collins

By Jesse Trout | September 10, 2026

Mini Split Services in Colorado

While it typically only breaks 80°F for only 3–5 months a year in Arvada, having a working air conditioning unit is crucial during those hot months. In Colorado, mini splits are a popular home cooling solution for many households. They are an efficient way to keep your home cool and comfortable while helping save money in the long run. McCormick's NATE and EPA-certified technicians are prepared to handle your mini split installations and repairs. Contact us to request a free quote.

24/7 EMERGENCY SERVICES!!

Top-Rated HVAC Services in Arvada

Top-Rated HVAC Repairs Company Keeping Arvada & Northern Colorado Comfortable Since 2006!

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An HVAC Company You Can Trust

Just Ask Our Customers

...and counting!

AC Services

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Other Services

Quality HVAC Work, Backed By Experience

Support Small Businesses

Finance Options Available

100% Satisfaction Guaranteed

HVAC Repairs in Arvada, CO

Need Emergency HVAC Help Now?

WORK WE'RE PROUD OF

Real HVAC Installs & Repairs We've Done Across Northern Colorado

LIMITED TIME DEALS

HVAC SPECIALS

SEASONAL PROMOS

The McCormick Difference

Satisfaction Guaranteed

Greeley Locals

Competitive Pricing

800+ 5-Star Reviews

Educational Walkthroughs

Clean and Efficient Work

The Team Behind Greeley's Best HVAC Company

Financing Plans

How Old Is Your Unit?

HVAC Emergency Services

How Can We Help?

Read the Latest News and Updates From the HVAC Industry

Mini Split Services in Colorado

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