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

Find Heating and air conditioning pros in Thornton

Avatar for Mountain Pro HVAC Services, LLC

Mountain Pro HVAC Services, LLC

4.98(
123
)
Approved Pro

Mountain Pro HVAC Services, LLC

4.98(
123
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
8 years of experience

We are a locally owned heating and air conditioning business out of Aurora Colorado. We provide services for both home owners and commercial clients all around the Denver metro area. Our crew of professionals strive to bring top notch services and solid solutions to our customers with no pressure for sales. The business is owned and operated by Adrian Vargas who served in the US Marines and battled on the front lines in Iraq and Afghanistan. You can rely on Mountain Pro HVAC Services to meet all your Heating and Cooling needs!

"Timely help with our furnace. Adrian went above and beyond ensuring our furnace was not only fixed but operating efficiently- offering alternative suggestions to improve efficiency and save us money in the long run in the winter and summer months. Highly recommend!"

Jessica N on January 2025

We are a locally owned heating and air conditioning business out of Aurora Colorado. We provide services for both home owners and commercial clients all around the Denver metro area. Our crew of professionals strive to bring top notch services and solid solutions to our customers with no pressure for sales. The business is owned and operated by Adrian Vargas who served in the US Marines and battled on the front lines in Iraq and Afghanistan. You can rely on Mountain Pro HVAC Services to meet all your Heating and Cooling needs!

"Timely help with our furnace. Adrian went above and beyond ensuring our furnace was not only fixed but operating efficiently- offering alternative suggestions to improve efficiency and save us money in the long run in the winter and summer months. Highly recommend!"

Jessica N on January 2025


Avatar for Lous Heating and Cooling LLC

Lous Heating and Cooling LLC

4.98(
65
)
Approved Pro

Lous Heating and Cooling LLC

4.98(
65
)
Approved Pro
Super Service Award
Customers say: True professional
6 years of experience
Free onsite estimate

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"On time, very friendly, quick work. "

Seth G on October 2025

is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"On time, very friendly, quick work. "

Seth G on October 2025


Avatar for Dude Dryer Vent Cleaning, LLC

Dude Dryer Vent Cleaning, LLC

4.98(
87
)
Approved Pro

Dude Dryer Vent Cleaning, LLC

4.98(
87
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
21 years of experience

At Dude Dryer Vent Cleaning, LLC, your safety and comfort come first. We are a Veteran-Owned Small Business (VOSB) built on the belief that our customers’ needs are our highest priority. Every home and business we serve receives the same level of professionalism, reliability, and attention to detail that defined our military service. Our team is Chimney Safety Institute of America (CSIA)–certified Dryer Exhaust Technicians (C-DET), trained to handle everything from routine cleanings to complex multi-story and commercial systems. No job is too big or too small — we show up prepared, respectful, and focused on doing the job right. We welcome the opportunity to earn your trust and deliver the best dryer-vent cleaning service in the region. Call to schedule your appointment: 📍 Denver Metro: 720-298-1629 📍 Las Vegas: 702-498-0111 🌐 www.DudeDryerVent.com

"He was thorough, helpful and very communicative. Took before and after pictures to show work had been done well. Very pleased. He also does a lot of other Handiman things so we plan on calling him again. "

Richard v on January 2026

At Dude Dryer Vent Cleaning, LLC, your safety and comfort come first. We are a Veteran-Owned Small Business (VOSB) built on the belief that our customers’ needs are our highest priority. Every home and business we serve receives the same level of professionalism, reliability, and attention to detail that defined our military service. Our team is Chimney Safety Institute of America (CSIA)–certified Dryer Exhaust Technicians (C-DET), trained to handle everything from routine cleanings to complex multi-story and commercial systems. No job is too big or too small — we show up prepared, respectful, and focused on doing the job right. We welcome the opportunity to earn your trust and deliver the best dryer-vent cleaning service in the region. Call to schedule your appointment: 📍 Denver Metro: 720-298-1629 📍 Las Vegas: 702-498-0111 🌐 www.DudeDryerVent.com

"He was thorough, helpful and very communicative. Took before and after pictures to show work had been done well. Very pleased. He also does a lot of other Handiman things so we plan on calling him again. "

Richard v on January 2026


Avatar for Steven & Sons Heating and Cooling

Steven & Sons Heating and Cooling

4.87(
112
)
Approved Pro

Steven & Sons Heating and Cooling

4.87(
112
)
Approved Pro
Customers say: Quality work
11 years of experience
Free onsite estimate

Steven & Sons Heating and Cooling does any job big or small. We take pride in our work our goal is to keep every customer happy. We keep our prices low and our quality of work high.. The list goes on. We offer free estimates and will be happy to sit down with you to talk about the job on hand. We look forward to servicing your needs. Call us for an estimate today!

"My experience with Steven and Sons company was as positive as it gets. I had a faulty furnace in the middle of the winter with a newborn at home. Mariano was quick to respond and provided transparent and very competitive pricing. I would 100% recommend Steven&Sons."

Nelson S on June 2025

Steven & Sons Heating and Cooling does any job big or small. We take pride in our work our goal is to keep every customer happy. We keep our prices low and our quality of work high.. The list goes on. We offer free estimates and will be happy to sit down with you to talk about the job on hand. We look forward to servicing your needs. Call us for an estimate today!

"My experience with Steven and Sons company was as positive as it gets. I had a faulty furnace in the middle of the winter with a newborn at home. Mariano was quick to respond and provided transparent and very competitive pricing. I would 100% recommend Steven&Sons."

Nelson S on June 2025


A-Moonlight Heating & Air Conditioning

4.96(
50
)
Approved Pro

A-Moonlight Heating & Air Conditioning

4.96(
50
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
12 years of experience

At A-Moonlight Heating & Air Conditioning, we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers needs. It is our mission to provide excellent and complete customer satisfaction from start to completion of a project. Call us today to learn more!

"They were great!!!"

Cynthia C on February 2025

At A-Moonlight Heating & Air Conditioning, we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers needs. It is our mission to provide excellent and complete customer satisfaction from start to completion of a project. Call us today to learn more!

"They were great!!!"

Cynthia C on February 2025


Avatar for Flatirons Plumbing, Inc.

Flatirons Plumbing, Inc.

4.91(
227
)
Approved Pro

Flatirons Plumbing, Inc.

4.91(
227
)
Approved Pro
Super Service Award
Customers say: Super punctual
11 years of experience
Free onsite estimate

Flatirons Plumbing is a family owned and operated plumbing company serving the Denver Metro Area. We provide custom water filtration and water treatment solutions for your home, with your family in mind. Even the fresh Rocky Mountain water we drink here in Colorado contains harsh substances; give us a call today at (720) 630-1784 for a custom water treatment filtration system for your home!

"Was available to come out same day I called for service. Very friendly and helpful. Got the job done."

Paula W on December 2025

Flatirons Plumbing is a family owned and operated plumbing company serving the Denver Metro Area. We provide custom water filtration and water treatment solutions for your home, with your family in mind. Even the fresh Rocky Mountain water we drink here in Colorado contains harsh substances; give us a call today at (720) 630-1784 for a custom water treatment filtration system for your home!

"Was available to come out same day I called for service. Very friendly and helpful. Got the job done."

Paula W on December 2025


Avatar for Behold Heating & Cooling Services

Behold Heating & Cooling Services

5.00(
33
)
Approved Pro

Behold Heating & Cooling Services

5.00(
33
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
3 years of experience

Behold the Difference! Every day we are invited into our customer’s homes. Into their safe place and sanctuary. Quite often this is in the midst of a concern or issue that needs to be fixed! With an extensive background that spans well beyond just the trades, we love to be different. In addition to decades of industry experience, we bring some secret sauce - we love to take all the time needed to help, to make sure you are comfortable, and to provide amazing solutions. Come BEHOLD the difference! "Unfortunately we do not service or intall swamp or evaporative coolers".

"Chris and his team were great. They cared enough to put on shoe covers while walking in my home. Chris was very informative about the humidifier installation process. Thanks"

Joann J on December 2025

Behold the Difference! Every day we are invited into our customer’s homes. Into their safe place and sanctuary. Quite often this is in the midst of a concern or issue that needs to be fixed! With an extensive background that spans well beyond just the trades, we love to be different. In addition to decades of industry experience, we bring some secret sauce - we love to take all the time needed to help, to make sure you are comfortable, and to provide amazing solutions. Come BEHOLD the difference! "Unfortunately we do not service or intall swamp or evaporative coolers".

"Chris and his team were great. They cared enough to put on shoe covers while walking in my home. Chris was very informative about the humidifier installation process. Thanks"

Joann J on December 2025


Avatar for Behold Heating & Cooling Services

Behold Heating & Cooling Services

4.98(
32
)
Approved Pro

Behold Heating & Cooling Services

4.98(
32
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
3 years of experience

Every day we are invited into our customer’s homes. Into their safe place and sanctuary. Quite often this is in the midst of a concern or issue that needs to be fixed! With an extensive background that spans well beyond just the trades, we love to be different. In addition to decades of industry experience, we bring some secret sauce - we love to take all the time needed to help, to make sure you are comfortable, and to provide amazing solutions. Come BEHOLD the difference!

"Highly recommended and I will be calling next time I need help. My heater wasn't heating so I called around. Dylan was able to come straight over, less than 2 hours after I called the house was warm. Luckily it was a simple fix, no parts needed (a spider had built it's web in there), so the whole repair was covered under the $89 service fee. Dylan was respectful of me and of my home. AND he told me they work on swamp coolers, which is sort of hard to find these days."

Samantha S on October 2025

Every day we are invited into our customer’s homes. Into their safe place and sanctuary. Quite often this is in the midst of a concern or issue that needs to be fixed! With an extensive background that spans well beyond just the trades, we love to be different. In addition to decades of industry experience, we bring some secret sauce - we love to take all the time needed to help, to make sure you are comfortable, and to provide amazing solutions. Come BEHOLD the difference!

"Highly recommended and I will be calling next time I need help. My heater wasn't heating so I called around. Dylan was able to come straight over, less than 2 hours after I called the house was warm. Luckily it was a simple fix, no parts needed (a spider had built it's web in there), so the whole repair was covered under the $89 service fee. Dylan was respectful of me and of my home. AND he told me they work on swamp coolers, which is sort of hard to find these days."

Samantha S on October 2025


Avatar for Comfair Heating and Cooling LLC

Comfair Heating and Cooling LLC

5.00(
20
)
Approved Pro

Comfair Heating and Cooling LLC

5.00(
20
)
Approved Pro
Super Service Award
3 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality and customer service that we provide to meet every consumer's needs. It is our mission to provide excellent customer service from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Habib and his team did an excellent job repairing 1 furnace and 1 condenser unit, and replacing a second furnace and condenser unit. His expertise and attention to detail are additionally impressive. Trust Habib, he's the best!"

Michael F on January 2026

We take great pride in our experience, expertise, quality and customer service that we provide to meet every consumer's needs. It is our mission to provide excellent customer service from start to completion of a project. To understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a personal and professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Habib and his team did an excellent job repairing 1 furnace and 1 condenser unit, and replacing a second furnace and condenser unit. His expertise and attention to detail are additionally impressive. Trust Habib, he's the best!"

Michael F on January 2026


Avatar for Applewood Plumbing Heating & Electric

Applewood Plumbing Heating & Electric

4.87(
573
)
Approved Pro

Applewood Plumbing Heating & Electric

4.87(
573
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
53 years of experience

We have been proudly serving Denver, Boulder and the surrounding metro areas for over 50 years! At Applewood EVERY technician is licensed, background checked & drug tested. When using Applewood, customers receive a picture and short bio of the technician dispatched to their home. We will fix your problem RIGHT, the first time, at an approved, up-front price. After your appointment, we follow up with a phone call to make sure your appointment went just as you expected. We are open 6AM to 10PM, 7 days a week to serve you at your convenience with NO OVERTIME CHARGES.

"Fast effective!!"

Jennifer R on December 2025

We have been proudly serving Denver, Boulder and the surrounding metro areas for over 50 years! At Applewood EVERY technician is licensed, background checked & drug tested. When using Applewood, customers receive a picture and short bio of the technician dispatched to their home. We will fix your problem RIGHT, the first time, at an approved, up-front price. After your appointment, we follow up with a phone call to make sure your appointment went just as you expected. We are open 6AM to 10PM, 7 days a week to serve you at your convenience with NO OVERTIME CHARGES.

"Fast effective!!"

Jennifer R on December 2025

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Heating and Air Conditioning questions, answered by experts

When your AC contactor goes bad, you might hear chattering or buzzing noises coming from your air conditioner. You may also notice that your AC is running but isn’t cooling your home. In some cases, your air conditioner might not even turn on at all. There could also be physical damage, discoloration, or corrosion around the contactor.

You may be able to clean mold from your air conditioner in some cases. If the mold growth only takes up a small area, you can use either vinegar or bleach mixed with water to remove it. Larger areas of mold should be left to the professionals, though. It's also a good idea to leave mold removal to the pros if you are sensitive to mold or have asthma. 

Indications of an HVAC problem include inconsistent heating or cooling throughout your home, unpredictable temperature changes, or inadequate air flow from vents. Abnormal sounds such as grinding, banging, or hissing, and unpleasant smells like mustiness or burning are also potential warning signs. A rise in energy costs without an increase in usage may also imply decreased efficiency. An HVAC system that frequently cycles on and off or cannot maintain a stable temperature is malfunctioning.

You should schedule a full-service AC inspection at least once a year to ensure it works properly. During this time, your local AC repair pro will check:

  • Safety components, such as carbon monoxide leaks

  • Cooling components, like coolant levels 

  • Electrical components, such as inspecting fuses and wiring

  • Complete system services, like flushing the drain line

While you can DIY some aspects, like changing your air filter, it’s imperative that you call in a pro to inspect your AC for you. Your air conditioner has refrigerant that could be hazardous to your health if not handled properly, so it’s best to let a pro with experience take on this job.

If you run an AC with a dirty filter, it could allow dust and dirt to build up in your ductwork, which could make you sick. At the same time, your air conditioner won’t work as efficiently as it would with a clean filter, likely resulting in less airflow, more wear and tear on your HVAC system, and higher energy bills.

The Thornton, 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.

What do you need done? We’ll find top pros.
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  • 🏠 "Repair shingles on an asphalt roof"