Quick and Effective AC Repair Service

Living in Boulder, it’s a long wait for summer to finally arrive. When the outside temperature soars, you need a perfectly cool indoor oasis. The season is too hot and too short to live with unsatisfactory performance from your air conditioner. Get problems solved quickly and effectively by calling Welzig Heating and Air at (720) 336-3777. We schedule at your convenience and remain available for round-the-clock emergency repairs seven days per week.

Welzig Heating and Air is a Google Guaranteed Service Provider, Bryant Factory Authorized Dealer and three-time winner of the Bryant Circle of Champions Award. We are a family owned and operated HVAC company representing 29 of stellar services and satisfied customers. Our team of NATE-certified technicians love a good challenge, have worked on all brands and models of A/C units and handle both residential and commercial system repairs.

Boulder AC Repair Experts

If you have any complaints with the operation of your air conditioner, no matter how minor, we highly recommend arranging service without delay. Don’t take chances with escalating damage, energy waste, contaminated air quality or requiring replacement rather than a simple repair. The professionals from Welzig Heating and Air utilize state-of-the-art diagnostic software to isolate issues, determine the best course of action and restore peak operation. We strive to optimize system efficiency, capacity, reliability and lifespan, delivering worthwhile benefits.

Central AC Repair, AC Repair & Cooling System Repair Longmont, CO, Boulder, CO & Louisville, CO

Cooling System Repair, AC Repair & Air Conditioning Repair

Cooling System RepairAir Conditioning RepairCentral AC Repair

Satisfied Customers
They Speak For Us

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.


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!


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.

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Boulder, CO