CALL/TEXT TO BOOK TODAY (720) 336-3777

Air conditioning is a crucial part of our daily lives whether you’re relaxing at home or operating your business. When the temperatures are soaring outside in Longmont, CO, it’s essential to ensure you have a dependable AC system that will help you get through the hot summers comfortably and safely. At Welzig Heating and Air, we offer comprehensive maintenance services that will guarantee a reliable cooling system that will serve you well each summer. Our maintenance service will allow for a comfortable environment and you can also expect your cooling system to last longer.

You can count on our highly trained and experienced NATE-certified technicians to provide comprehensive AC maintenance service at your home or commercial building. Our experts will carefully inspect your entire AC system checking for signs of wear and tear. If we find any issues, we’ll fix the problem before the issue becomes serious and expensive to have fixed. We work hard to clear out any debris, clean or replace air filters, check electrical connections, check refrigerant levels, and lubricate moving parts. When we service your AC system, we guarantee you won’t have to worry about your cooling equipment breaking down.

To save money and keep your AC system protected, we recommend enrolling into our Comfort Club. You can enjoy excellent benefits such as discounts on repairs, priority scheduling, discounts on system replacements, and a system that has a longer lifespan. When you want the best AC maintenance service in Longmont, make sure to contact us at 720-336-3777!

Satisfied Customers
They Speak For Us

Bob came out to look at our swamp cooler and was remarkably helpful and professional. Not only did he give me a knowledgeable diagnosis, but he also taught me a lot in the process. We’ll be calling him for all future needs with our cooling system.


Our 23-year-old A/C system ran out of “borrowed time” and became too difficult to continue maintaining. With great advice from Casey Welzig,, we replaced the old system with a Bryant Evolution A/C system. Max Loustaunau and Seth Bernhardt did an excellent job with removing the old system and installing the new one. Both of them are great to work with — very professional and very personable. We are really amazed at how much better the new system works!


Dave Kaplan-Gomez and James Miltersen installed my new Tankless Water Heater. Both were polite and professional. Care was taken not to damage anything in my house which I really appreciated. I use Welzig for all my HVAC needs and highly recommend them.

Leave Us a Review!
Google Reviews
Angies List Reviews
Yelp Reviews
Facebook Reviews
Contact Us Now For A
Free Estimate