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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon450
    Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Boulder, CO

*The Angi rating for Heating And Air Conditioning Service companies in Boulder, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Boulder, CO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on September 08, 2025

Find Heating and air conditioning pros in Boulder

Avatar for One Hour Heating & Air Conditioning - Loveland
One Hour Heating & Air Conditioning - Loveland
4.7(
207
)

Serving Boulder, CO and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1978

Free estimates

Emergency services offered

"Brian, the HVAC technician was professional, friendly and extremely knowledgeable, he provided a full estimate before starting the work and then performed the repair immediately. We were back up and running in minutes. Well Done 1 hr team."
61 neighbors recently requested a quote
Recommended by93%of homeowners
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Avatar for Mountain Pro HVAC Services, LLC
Mountain Pro HVAC Services, LLC
5.0(
126
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Adrian was tremendous! He took on a tough project, never gave up and solved my HVAC problem. Patient, thoughtful, collaborative with pricing. Recommend him without reservation."
Maintenance Services
Maintenance Services
Maintenance Services
Maintenance Services
New AC / Furnace Install

+4

Response time11 hrs
Response rate92%
1 neighbors recently requested a quote
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Avatar for HighPoint HVAC
HighPoint HVAC
5.0(
19
)

Serving Boulder, CO and surrounding areas

Approved

Credit card accepted

"They did an exceptional job and provided valuable (and fair) insight on the level of cleaning / inspection needed for various chimneys throughout our home. Would definitely recommend."
3 neighbors recently requested a quote
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Avatar for Pacific Air, Inc.
Pacific Air, Inc.
4.8(
84
)

Serving Boulder, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Offers commercial services

"They did a great job installing a new thermostat & water heater at my house. The tech Ray was great to work with and I will be calling them with any further HVAC needs."
New inside set up
New Outside set up
Before inside set up
Before outside set up
Response time4 hrs
Response rate94%
5 neighbors recently requested a quote
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A-Moonlight Heating & Air Conditioning
5.0(
52
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2014

Emergency services offered

Warranties offered

"A-Moonlight provided timely and professional service. They were able to diagnose issues with my A/C and furnace quickly and explained the issue and their proposed solutions. Brent made me aware of my options for repair and what services were necessary and what was not. They were able to install the parts I purchased and service my furnace and A/C within a few hours. They got everything working in one trip and charged about 1/6th of what a competitor was asking. I would highly recommend A-Moonlight for any residential HVAC needs and I will be hiring them in the future should I need any other HVAC services."
Response time3 hrs
8 neighbors recently requested a quote
Recommended by96%of homeowners
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Avatar for AT Mechanical LLC
AT Mechanical LLC
5.0(
10
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

"Jason was great! My expansion tank on my water heater blew over night. Jason was quick to respond, charged fairly, and had the new water heater installed same day. Extremely professional and friendly. Highly recommend his services and I will be using him again."
AT Mechanical LLC
AT Mechanical
AT Mechanical
AT Mechanical
AT Mechanical

+3

11 neighbors recently requested a quote
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Avatar for Your Comfort Heating and Cooling
Your Comfort Heating and Cooling
5.0(
19
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"We had two AC units and a new furnace installed they were prompt, efficient, very respectful and great customer service! Dean was an absolute pleasure to work with, they have earned my business for life on any HvAC services I might need! Highly recommend"
New Amana Furnace
New Amana Heat Pump
High Efficiency
Outside Condensers
two new condensers

+3

Response time40 mins
Response rate92%
22 neighbors recently requested a quote
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Avatar for Steven & Sons Heating and Cooling
Steven & Sons Heating and Cooling
4.8(
116
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2015

Emergency services offered

Warranties offered

"Steven and Mario were hands down the best guys for the job. Very Professional and knowledgeable about what they are doing. I am going to recommend them to anyone I know that needs hvac work done.. It was a pleasure to have met them and will continue to use Steven and sons in the future 10/10!!"
Steven Brazing one of our larger projects
Brazing
Mariano Brazing
Furnace Loaded and ready for delivery
Cutting

+47

Response time4 hrs
Response rate92%
7 neighbors recently requested a quote
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Avatar for Limelight Services LLC
Limelight Services LLC
4.7(
19
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"Limelight does an amazing job. They installed all the electrical in our building. They were efficient, detailed, alert to our needs, and did an overall awesome job. When it comes to electrical, HVAC, or plumbing I can trust these guys. They stand behind their work & are friendly and easy to deal with. Highly recommended!"
Safety first! Only hire companies that look out for the safety of their workforce!
We love seeing a new furnace installed, it means years of comfort and reliability to come!
LED tape inside and under cabinets
We own our excavation equipment, so we can be there for repairs, same day! There is no time to waste when the waste won't flow.
Check out this beautiful spring view from a customer's home in SW Boulder, CO. We will take care of everything you need inside and outside of your house, plumbing, HVAC, or electrical related!

+38

Response time1 day
28 neighbors recently requested a quote
Recommended by82%of homeowners
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Avatar for Behold Heating & Cooling Services
Behold Heating & Cooling Services
5.0(
57
)

Serving Boulder, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Ryan was an excellent HVAC technician. He quickly diagnosed the problem and had our furnace up and running in 20 minutes. I would highly recommend Behold H & C."
Mini Split Install
A nice, new, clean Boiler - restoring heat right in time for the evening!
Glad we were able to restore heat same day for this customer. Replaced Furnace and A/C for proper installation, air flow and 10 year warranty on FULL SYSTEM.
Glad we were able to restore heat same day. Full Boiler replacement, repipe and zone valves.
Mini Split Install

+67

74 neighbors recently requested a quote
Recommended by62%of homeowners
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Showing 1-10 of 657
Heating and Air Conditioning questions, answered by experts

No, you should not attempt to replace an AC evaporator coil yourself. This is a complex task that must be performed by a licensed HVAC technician. The process involves handling hazardous and flammable refrigerants, which poses significant safety risks. Attempting a DIY replacement can also cause further damage to your HVAC system and will likely void its warranty. It is necessary to hire a local AC repair professional for this job.

To reset your air conditioner, start by turning it off at the thermostat. Then, shut off power to the AC system at the circuit breaker. Some units have a dedicated "reset" button; if yours does, press and hold it for three to five seconds. If your air conditioner doesn't have a reset button, or if you are resetting it after a power outage, leave the circuit breaker off for at least 30 minutes to allow the system to reset itself. Afterward, turn the power back on at the breaker, turn on the AC from the thermostat, and set it to "cool" to test the system.

Common signs of insufficient return air include uneven temperatures, with some parts of your home feeling hotter or colder than others, and noticeable differences in air pressure between rooms. You might also observe that more air is blowing in rooms closer to the AC unit. Leaky air ducts can also be a related issue or clue.

Turn your system off when you're toasty or when you're out to prevent unnecessary wear. Using the timer on your thermostat so that it switches off when it reaches a certain temperature or turns on just before you get back from work is best. An annual maintenance contract can be helpful to ensure your system receives these important services at regular intervals.

You should clean your air conditioner at least once per year, but you may need to clean your whole HVAC system (including the air ducts) more often. According to the National Air Duct Cleaners Association, you may need to clean them more frequently depending on factors like whether you smoke, have pets, or have allergies.

The Boulder, CO homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles