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5 Best AC Repair Services in Thornton, CO

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Written By Max Peterson|Last Updated: February 05, 2024

Technical breakdowns can be a stressful situation for residents who need an air conditioner (AC) repair in Thornton, especially in the summertime when keeping cool is essential. Whether you need routine maintenance, emergency repairs, or total AC replacement, we'll highlight the best AC repair in Thornton so you can get your home back to a comfortable temperature quickly.

Top AC Repair Companies in Thornton, CO

True Heating & Cooling Logo

True Heating & Cooling

Based on 1,314 customer reviews.

Services Offered

Boiler InstallationAc InstallationDuctlessMaintenanceIndoor Air QualityFurnace RepairAc RepairFurnace InstallationEmergency Services


  • Prompt service delivery
  • Informative resources
  • Reliable customer support
1351 W 121st Ave, Westminster, CO 720-637-5157 trueheatingcolorado.com
Comfort Pros Heating and Air Conditioning Logo

Comfort Pros Heating and Air Conditioning

Based on 368 customer reviews.

Services Offered

VentilationAc InstallationMaintenanceAc RepairDuctlessFurnace Installation


  • Informative resources
  • Reliable customer support
  • Clear pricing policy
12075 Moline St, Henderson, CO 303-945-4319 comfortpros.net
Now Heating and Air Logo

Now Heating and Air

Based on 1,334 customer reviews.

Services Offered

Furnace RepairInspectionBoiler RepairEmergency ServicesFurnace InstallationMaintenanceAc RepairBoiler InstallationAc InstallationDuctlessDuct CleaningIndoor Air Quality


  • Clear pricing policy
  • Free quote
  • Reliable customer support
8661 Rosemary St, Commerce City, CO 303-287-8000 nowha.com
Sanders and Johnson Heating and Cooling Logo

Sanders and Johnson Heating and Cooling

Based on 357 customer reviews.

Services Offered

Ac InstallationFiltrationBoiler InstallationEmergency ServicesMaintenanceIndoor Air QualityInspectionFurnace InstallationAc RepairBoiler RepairDuctlessFurnace Repair


  • Clear pricing policy
  • Prompt service delivery
  • Informative resources
7100 Broadway #7k, Denver, CO 720-594-2176 sandersandjohnson.com

More Local Hvac Companies

Controlling Systems

User Reviews: 5/5 

7000 N Broadway #1-106
Denver, CO 80221

Apex Clean Air AC & Heating Repair

User Reviews: 5/5 

6401 Broadway Unit L
Denver, CO 80221

Coffman & Company

User Reviews: 5/5 

5960 Jay St f
Arvada, CO 80003

Gale Force Heating and Air Conditioning

User Reviews: 4.7/5 

983 E 70th Ave
Denver, CO 80229

Colorado Heating and Mechanical Professional Services

User Reviews: 4.7/5 

387 E 55th Ave
Denver, CO 80216

Goodfellas Heating and Cooling Inc.

User Reviews: 4.6/5 

1412 W 104th Ave Suite 120
Northglenn, CO 80234

Green-Tech Heating & Cooling

User Reviews: 4.6/5 

2951 W 91st Ave
Federal Heights, CO 80260

303 Heat

User Reviews: 4.6/5 

10824 Leroy Dr #7
Northglenn, CO 80233

Pure Air Solutions

User Reviews: 4.6/5 

14245 Forest St
Thornton, CO 80602

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

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Facts about Thornton
Average Max Temp Percentile:65.1%
August Average Max Temp:87.6°F
Climate Zone:Cold
Average Energy Cost:$0.11/kWh
Median Year Houses Built:1989
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

By understanding which type of air conditioner you have, you'll feel more empowered in your provider search. Thornton HVAC professionals have experience with different AC makes and models, and they can adapt their skills to your needs.

  • Ductless mini-split: Ductless mini-splits have an exterior unit and one or more indoor units, with no ductwork required. They offer higher energy efficiency, flexible installation options, and individual room temperature control.
  • Portable air conditioners: As the name implies, portable ACs 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 a common choice for apartments, condos, or individual rooms.
  • Split ACs: Split ACs 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 ACs: Window air conditioners are a popular choice for Thornton condos, apartments, and townhomes. These budget-friendly, convenient units are designed for cooling small spaces and single rooms, and they fit snugly in a window frame or dedicated wall slot. Many window-mounted AC users deploy their units without professional assistance, though technicians can still help with maintenance and repairs.
  • Central AC: These are the most common residential AC systems, offering precise, consistent temperature control. They feature a central unit that cools and purifies outside air and sends it through ducts to various rooms in your home.

How to Choose Your Thornton AC Repair Service

While you might want to resolve your AC issue quickly, you should do your research before hiring a repair service. Take the following steps to ensure you find the right 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.

Many states and cities also require companies to carry liability insurance. Even if your community doesn't require it, we still recommend choosing an insured company. This will protect you if an accident happens or something gets damaged.

Read Customer Reviews

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

It's common for even the best AC repair businesses 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 value. A good estimate should factor in additional fees such as permitting costs. You should also ask about manufacturer warranties, installer guarantees, and the emergency repair process.

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Frequently Asked Questions About AC Repair in Thornton

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

Your AC 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 swapping out the compressor will be more expensive.

See the average costs for common AC repairs below.

Common RepairAverage Cost
Clogged air filter$64–$170
Electrical circuits$200–$250
Drainage problems$100–$150
Refrigerant leak$400–$1500
Frozen condenser coils$1,273–$3,818
Fan or air blower issues$150–$200
Compressor replacement$600–$1,612

How often should Thornton homeowners have their AC systems serviced?

Homeowners should have their AC systems serviced at least once a year to ensure optimal performance. This usually involves cleaning the outdoor unit of brush and debris. Regular servicing can help to maintain the system's efficiency and prolong its lifespan.

When is the best time to replace an AC unit?

To determine the best time for your installation, consider both local weather patterns and company demand. Generally, contractors get busier as the weather warms up and less busy during the cooler months. Therefore, it might be best to get the job done between late September and mid-November or March to mid-May.

Why should I hire an HVAC professional? Couldn't I repair my air conditioner myself?

Yes, it's better to get a new air conditioner professionally installed. Most units have complex piping and wiring that can overwhelm even an experienced do-it-yourselfer. They also use chemical coolants that could pose serious safety risks if they spill or leak. With their training and equipment, the right technician will set you up for success.

How many years until I should replace my AC unit?

With adequate care, your air conditioner's lifespan could be 10-15 years. Remember that parts often become obsolete as time goes on. If your servicer can't find a critical replacement part, you might need to consider installing a new AC.

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