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Top-Rated Air conditioning pros in Dupont - Updated Nov 2026

Avatar for M & H Air, LLC
M & H Air, LLC
5.0(
18
)
Central A/C - Service or RepairCentral A/C - InstallCentral A/C - Install - For Business+2 more

Serving Dupont, CO and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"M&H Air helped upgrade Gas furnace/ Forced air heating system, by adding new ducts and vents in basement to help create more comfortable living space. Also has provided great preventive maintenance service to my Heating and A/C system!"
M & H Air, LLC
Victory Outreach Church
2 neighbors recently requested a quote
Avatar for Behold Heating & Cooling Services
Behold Heating & Cooling Services
5.0(
87
)
Central A/C - InstallCentral A/C - Service or RepairCentral Humidifier - Install or Replace+2 more

Serving Dupont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"We had an outstanding experience with Behold Heating & Cooling Services! Our HVAC blower (squirrel cage) failed on Thursday evening, just before a weekend with temperatures expected to reach 102 degrees. After calling multiple HVAC companies and being told no one could come out until the following week, Behold was able to schedule Erfan Azimi to come out right away. Erfan quickly diagnosed the problem, picked up the necessary parts, and had our air conditioning back up and running before the weekend. He was personable, knowledgeable, efficient, and took the time to explain everything clearly. We truly appreciated the prompt service and professionalism, especially given how busy HVAC companies are during this heat. I highly recommend Erfan Azimi and Behold Heating & Cooling Services. They turned what could have been a miserable weekend into a comfortable one!"
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

20 neighbors recently requested a quote
Recommended by41%of homeowners
Avatar for Comfair Heating and Cooling LLC
Comfair Heating and Cooling LLC
5.0(
24
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+4 more

Serving Dupont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"I recently had Comfair Heat and AC install a new furnace, and I couldn’t be happier with the experience. From start to finish, the team was timely, professional, and incredibly friendly. They showed up exactly when they said they would, walked me through the process, and completed the installation efficiently without cutting any corners. Their pricing was very fair compared to other quotes I received, and the quality of their work truly stands out. The new furnace runs perfectly, and the difference in comfort is noticeable already. Overall, Comfair delivered fantastic service, and I highly recommend them to anyone needing heating or AC work. I’ll definitely be using them again in the future."
Commercial
Commercial
Furnace fix
New  Unit install
Residential

+3

Response time3 hrs
Response rate100%
Avatar for Woelfel Heating & Air Inc.
Woelfel Heating & Air Inc.
4.2(
153
)
Central A/C - Service or Repair

Serving Dupont, CO and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

We pride our company on reliability, great communication, integrity, and quality work. We are experts Woelfel Heating & Air is a trusted, family-owned HVAC company proudly serving Northern Colorado. We specialize in heating and air conditioning repair, installation, and maintenance for all major brands. Known for our honest pricing, dependable service, and personal approach, we help homeowners stay comfortable all year long. Whether you need a quick fix or a full system replacement, our experienced team is ready to help with prompt and professional service.in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

Project Photos
Project Photos
Project Photos
Project Photos
Project Photos

+7

135 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Aether Mechanical, LLC
Aether Mechanical, LLC
4.5(
106
)
Swamp Cooler - Service or RepairCentral A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Dupont, CO and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Not the cheapest in the deck (and certainly not the most expensive, by far) but the ones you want to get the job done right and the work done to completion. This was the only company that went the extra mile to confirm the exact part that failed so a proper recommendation could be made. This led to a discovery that there was a problem with other components as well that would take a few more days to get parts. Amazingly, they gave us use of two portable air conditioning units while the parts arrived and were installed. Courteous and professional. Recommend!"
Mini-Split system
AC/Furnace Install
Cast Iron Boiler
AC Install
Boiler

+1

Response time7 hrs
Response rate89%
87 neighbors recently requested a quote
Avatar for Chatfields LLC
Chatfields LLC
5.0(
18
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For BusinessCentral Air Cleaner - Repair or Service+1 more

Serving Dupont, CO and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"**5 Stars — Small Business to the Rescue!** Brian and Valerie of Chatfields LLC AC and Heating saved the day! Our furnace failed while guests were staying at our property. A larger HVAC company quoted $2,150 to replace the circuit board and two pressure switches. Thankfully, we sought a second opinion. Brian carefully investigated, confirmed the board and one switch were working, and replaced only the faulty pressure switch. Heat was restored the same day for $275—a $1,875 difference! Beyond the savings, Brian was thorough, honest, professional, and true to his word. Meeting his wife, Valerie, was equally wonderful. They are such a kind, warm couple who made a stressful day easier. This is why I love supporting small businesses! Chatfields stepped in where a larger company fell short and earned my trust and future business. I'll gladly continue supporting hardworking small businesses like theirs. Thank you both for your integrity and outstanding service. Highly recommended!"
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FAQs for air conditioning projects in Dupont, CO

Most professional HVAC technicians require two to three hours to complete an expansion valve replacement. The timeframe depends on your unit's accessibility and whether additional repairs are needed. The process involves recovering refrigerant, removing the old valve, installing the new component, and recharging the system. Scheduling during less busy seasons may result in more convenient appointment times.

Operating your air conditioner with a malfunctioning expansion valve isn't advisable. Continuing to run the system could potentially damage other components, particularly your compressor, which is significantly more expensive to replace. If you notice performance issues like inconsistent cooling or unusual noises, it's best to have your system inspected before continuing regular use.

Expansion valves don't have a standard replacement schedule, as their longevity depends on system usage, maintenance frequency, and environmental factors. Regular professional maintenance helps identify potential valve issues before they cause system failure. Having your HVAC system serviced annually allows technicians to monitor component condition and recommend preventative replacements when necessary.

Refrigerant leaks require prompt professional attention. If your expansion valve is leaking, you'll likely notice reduced cooling performance and possibly hear hissing sounds near the unit. Addressing leaks quickly prevents further system inefficiency and avoids the environmental impact of released refrigerant. Your HVAC technician will need to repair the leak and recharge the system with the proper refrigerant type and amount.

Because many AC issues present similar symptoms, professional diagnosis is recommended. Problems like inadequate cooling, inconsistent temperatures, or strange noises could indicate expansion valve issues, but might also stem from refrigerant leaks, electrical problems, or airflow restrictions. A qualified HVAC technician has the tools and expertise to accurately identify the root cause and recommend appropriate repairs.

The Dupont, CO homeowners’ guide to air conditioning services

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