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AC units after being repaired by a local pro

5 Best AC Repair Services in Boulder, CO

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Written By Max Peterson|Last Updated: April 18, 2024

Are you in need of an AC repair in Boulder? Air conditioners (ACs) are vital to your family's summertime comfort, but an AC breakdown shouldn't have to break the bank. Boulder's HVAC companies apply the latest technology to design custom-tailored, cost-efficient solutions. Whether it's simple repairs or a full replacement you need, This Old House recommends starting your AC repair company search with these highly-rated Boulder providers.

Top AC Repair Companies in Boulder, CO

Air Mechanical Inc Logo

Air Mechanical

Based on 35 customer reviews.

Services Offered

Emergency ServicesAc InstallationIndoor Air QualityInspectionBoiler InstallationFurnace InstallationSmart Home IntegrationMaintenanceAc RepairDuctless


  • Free quote
  • Informative resources
  • Prompt service delivery
2700 S Main St Unit B, Erie, CO 720-381-3273 airmechinc.com
SAC Mechanical Heating & Air Conditioning Logo

SAC Mechanical Heating & Air Conditioning

Based on 24 customer reviews.

Services Offered

Furnace InstallationAc InstallationFiltrationAc RepairBoiler InstallationFurnace RepairIndoor Air QualityBoiler Repair


  • Clear pricing policy
  • Informative resources
  • Reliable customer support
105 S Sunset St A, Longmont, CO 303-825-9483 sacmechanical.com
Thin Air Heating and Cooling Repair Logo

Thin Air Heating and Cooling Repair

Based on 68 customer reviews.

Services Offered

MaintenanceFurnace InstallationAc RepairAc Installation


  • Free quote
  • Clear pricing policy
  • Prompt service delivery
9767 Holland Cir, Westminster, CO 720-999-6795 thinairheatingandcooling.com
Innovations Mechanical LLC Logo

Innovations Mechanical

Based on 23 customer reviews.

Services Offered

Furnace InstallationAc RepairAc InstallationMaintenanceInspectionBoiler Installation


  • Reliable customer support
  • Informative resources
  • Clear pricing policy
1446 Hover St Office #201, Longmont, CO 970-551-3231 staging.yourwebsitedemos.com

More Local Hvac Companies

Circulating Air Inc

User Reviews: 4.5/5 

500 9th Ave #12
Longmont, CO 80501

True Heating & Cooling

User Reviews: 5/5 

1351 W 121st Ave
Westminster, CO 80234

DMC Services

User Reviews: 4.7/5 

7564 Moore Ct
Arvada, CO 80005

Colorado's Finest Heating and Air Conditioning

User Reviews: 4.6/5 

1524 Collyer St
Longmont, CO 80501

Blue Valley Heating & Cooling

User Reviews: 5/5 

1740 Skyway Dr UNIT H
Longmont, CO 80504

Blue Horse Heat and AC

User Reviews: 4.6/5 

8781 Sheridan Boulevard #6027
Westminster, CO 80003

Goodfellas Heating and Cooling Inc.

User Reviews: 4.6/5 

1412 W 104th Ave Suite 120
Northglenn, CO 80234

Coffman & Company

User Reviews: 5/5 

5960 Jay St f
Arvada, CO 80003

Unique Heating and Air Conditioning Inc.

User Reviews: 5/5 

10783 Irma Dr
Northglenn, CO 80233

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

AC units after being repaired by a local pro

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Facts about Boulder
Average Max Temp Percentile:33.1%
August Average Max Temp:78.7°F
Climate Zone:Cold
Average Energy Cost:$0.12/kWh
Median Year Houses Built:1974
Average Heat Waves per Year:0.0

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

Common Types of Air Conditioners

HVAC technicians have the expertise to service most air conditioner types, but knowing more about what you have can be beneficial. Below, we'll explain each of the common AC systems.

  • Portable air conditioners: As the name implies, portable AC units don't require permanent installation or ductwork. Instead, they remove hot air through an exhaust hose connected to a window or nearby vent. They're popular for apartments, condos, or individual rooms.
  • Split ACs: Split air conditioner units have two main elements: one indoors and one outdoors. They provide quiet operation, greater energy efficiency, ductwork options, and more cooling capability versus mini-splits.
  • Window-mounted ACs: Window air conditioners are a popular choice for Boulder townhomes, condos, and apartments. These budget-friendly, convenient units are designed for cooling single rooms and small spaces, and they fit snugly in a window frame or dedicated wall slot. Many window-mounted AC users install their units without professional assistance, though technicians can still help with maintenance and repairs.
  • Ductless mini-split: Ductless mini-split air conditioner units have an exterior unit and one or more indoor units, with no ductwork required. They offer individual room temperature control, flexible installation options, and higher energy efficiency.
  • Central AC: These are the most common residential AC systems, offering consistent, precise temperature control. They feature a central unit that cools and purifies outside air and sends it through ducts to different rooms in your home.

How to Choose Your Boulder AC Repair Service

While you might want to resolve your AC issue quickly, you should do some essential research before signing a contract with a repair service. Take the following steps to ensure you find the best company for your home.

Confirm the Company Is Properly Licensed and Insured

Colorado licenses plumbers and electricians at the state level, but not HVAC contractors. Counties and cities are free to issue their own licenses, and we encourage you to contact your local government for more information.

You should also confirm a company has sufficient liability coverage, even if your state doesn't require it. Choosing an insured company will protect you if mishaps arise during work.

Read Customer Reviews

Read customer reviews on the Better Business Bureau (BBB) website for each company you're interested in. The BBB recognizes businesses that resolve complaints professionally and honor their warranties.

It's normal for even the best AC repair companies to have both positive and negative reviews. Read each one carefully, and avoid a business if most reviewers had subpar experiences.

Compare Estimates

Obtain at least three detailed, written estimates from different providers for the best deal. A good estimate should include additional fees such as permitting costs. You should also ask about manufacturer warranties, the emergency repair process, and installer guarantees.

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Frequently Asked Questions About AC Repair in Boulder

How much can I expect to pay for AC repair in Boulder?

Your air conditioner repair costs will hinge on your system's make and model and the malfunctioning part. A basic repair job like sorting out a thermostat might cost $150–$250, whereas a more intricate fix like switching out the compressor will be more expensive.

See the average costs for common AC repairs below.

Common RepairAverage Cost
Clogged air filter$66–$176
Electrical circuits$200–$250
Drainage problems$100–$150
Refrigerant leak$400–$1500
Frozen condenser coils$1,318–$3,955
Fan or air blower issues$150–$200
Compressor replacement$600–$1,670

What are some signs that I should call an HVAC repair company?

Here are some of the most common AC issues you might face: It's best to contact a professional HVAC technician if you encounter any of these problems.

What do I do if my AC is running but not cooling?

If your AC is running but not cooling, a clogged condenser coil could be the culprit. Normally, the AC’s condenser fan pulls air into the outdoor unit through the condenser coil to extract heat energy from your home. A technician can help by clearing the clog or replacing a faulty coil.

How long is my air conditioner's lifespan? When should I consider a replacement?

You won’t need to change air conditioner for 10–15 years with proper maintenance. As your AC grows older, its mechanical parts might become hard to find. You'll probably need to consider new AC installation if your company can't replace a broken part.

Should my HVAC company have a private accreditation?

Private accreditations aren't always necessary, but firms that seek them are typically more trustworthy. The two largest HVAC trade bodies that issue certifications are the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) and Air Conditioning Contractors of America (ACCA).

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.