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Gaithersburg, MD

HVAC Service you can count on

4.8

(194 reviews)

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Heating & Air Conditioning

Services By One Hour

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HVAC Service Near Me 
—Available 24 Hours

One Hour Heating & Air Conditioning understands that heating and air conditioning issues create uncomfortable living situations — especially when temperatures outside are extreme. Luckily, our customer specialists are on standby 24/7 to fix your urgent issues. Whether you need HVAC installation, repair, or maintenance, our HVAC service experts are ready to help.

Emergency HVAC Services

We offer 24-hour emergency HVAC services – even on weekends and holidays – to ensure you have professional support when you need it most. Arriving with service trucks stocked full of specialty parts and tools, we have the equipment needed to fix many HVAC problems on the spot. In the case that additional parts are needed, rest assured – we will do everything in our power to handle your HVAC emergency quickly and efficiently.

Air Conditioning

Whether you need an emergency replacement, regular maintenance, or installation services, our qualified technicians have the experience and technological resources to get any HVAC job done correctly. We utilize the latest tools, products, and techniques to stay up to date with cutting-edge changes in the industry.

AC Repair

At One Hour Heating & Air Conditioning, our HVAC technicians service all major AC brands and models. Our AC repair team can fix:

  • Poorly insulated ductwork
  • Power supply breakdowns
  • Defective fans or thermostats
  • Refrigerant leaks
  • Frozen condenser coils
  • Blocked condensation drainage
  • AC short-cycling (turning on and off too quickly)

After inspection, we will provide a detailed estimate.

AC Installation & Replacement

There are many telltale signs that an HVAC unit might need to be replaced. If an HVAC unit is over 10-years old, smells terrible, blows warm air, or produces subpar results as energy bills keep rising, give us a call!

AC Maintenance

For optimal performance, AC units require many parts to work seamlessly together. A single problem can cause a ripple effect of issues. This is why spotting minor malfunctions is critical. With regular maintenance visits, we can ensure your HVAC system is operating smoothly and efficiently. Consider joining our Club Membership for additional customer benefits.

 

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Our Happy Customers

Reviews of Gaithersburg

4.8

(194 reviews)

Ron H

04-01-2025

“One Hour tech showed up on time, as usual, and did a comprehensive job. I have used One Hour for years now and am generally satisfied with the service. Office staff is also pleasant to deal with and efficient.”

K. Richardson

03-31-2025

“This was my first experience with One Hour Heating and Air Conditioning and I must say, I was impressed. My technician, Wael, arrived on time, and was both courteous and professional; but what impressed me the most was how knowledgeable he was. He went about diagnosing my AC trouble methodically. Once complete, Wael reviewed his findings and the associated cost for each repair item with me. He secured my sign-off before proceeding, and completed the work in a timely manner. I would absolutely hire One Hour Heating and Air Conditioning again. ☆☆☆☆☆”

Lakeshia Harley

03-31-2025

“Took his time to explain everything.”

Nikki McCann

03-25-2025

“I have had the pleasure of having Wael perform my HVAC inspection previously and have received top notch customer service both times. He is extremely thorough, answers all of my questions, and provides recommendations to keep my system in prime condition. In addition to his detail to his inspection, he is very personable and friendly which I really appreciate!”

Kelley Finn

03-21-2025

“William explained all options we have. He was clear on what we need to do.”