Reliable AC Service in Northern Virginia, Done Right the First Time

From tune-ups to emergency repairs, Dave’s keeps your Reston home cool, efficient, and comfortable all summer long.

Your Trusted Partner

When your air conditioner stops working, every hour counts. At Dave’s Heating & Air, we provide fast, professional AC service in Reston and throughout Northern Virginia — with repairs, tune-ups, and replacements done by experienced techs you can trust. Our goal is simple: keep your home comfortable and your system running efficiently year-round.

An HVAC technician from Dave's Heating & Air holding a manifold gauge set next to an outdoor Trane air conditioner condenser unit during a home service call.

How We Know Your AC Needs Attention

(Before You Do)

Our technicians are trained to spot the subtle warning signs most homeowners miss — the small performance issues that can turn into big repairs if ignored. Things like a slow refrigerant leak, worn fan motor, or clogged drain line may not seem urgent, but they signal it’s time for service before you lose cooling altogether.

When we inspect your system, we look beyond “does it blow cold air?” — we check pressure levels, airflow balance, electrical performance, and system efficiency. That’s the difference between a quick fix and a lasting repair.

Common Signs You Need AC Service

  • Warm air coming from vents
  • Weak airflow or uneven cooling
  • Strange noises or smells
  • Rising energy bills
  • AC constantly running or short-cycling
  • Your real estate agent or home inspector has told you it’s time to bring in a professional!

Why Homeowners Choose Dave’s

Local
Expertise

We’ve served Northern Virginia homes for 50 years.

Upfront
Pricing

No hidden fees — just honest quotes.

Licensed Technicians

Fully licensed and insured for your safety.

Respectful Service

We treat every home like it’s our own.

Request Service - It Only Takes 7 Seconds!​

By submitting this form and signing up for texts, you agree to receive informational messages (appointment reminders, account notifications, etc.) from Dave’s Heating & Air at the number provided. Msg & data rates may apply. Msg frequency varies. Unsubscribe anytime by replying STOP. Reply HELP for help or email us at davesheatingandac@gmail.com. Learn more on our Privacy Policy and Terms & Conditions page.

Keep Your HVAC System Running Smoothly

Dedicated to Your Comfort Since 1975

Air conditioning is essential, especially during the intense summer heat we experience in Northern Virginia. When your system isn’t working as it should, Dave’s Heating and Air Conditioning is here to help.

We specialize in a full range of residential and light commercial AC services, from quick repairs to complete system replacements.

Our team is well-versed in servicing and installing a variety of top brands, ensuring your system operates at peak efficiency.

With nearly five decades of experience, we take pride in delivering transparent service and lasting results to Reston, Herndon, Sterling, and across Northern Virginia. Trust us to keep your home or business cool and comfortable.

Smiling HVAC expert from Dave's Heating & Air wearing a company uniform shirt in a residential home setting.
Call 571.346.3940 to schedule your AC repair.

Hear It from Our Happy Customers

Nothing makes us prouder than hearing directly from the wonderful people we serve right here in Sterling, Herndon, Reston and Northern Virginia. Our reputation is built on knowledgeable technicians, courteous service, and the promise that we always leave your home as clean as we found it—if not cleaner!

Customers regularly praise our team for arriving on time, delivering expert system installations and repairs, and ensuring the whole process is seamless from start to finish. Whether it’s a complete HVAC replacement or routine maintenance, folks appreciate the extra care and attention to detail we bring. Many even say they’d recommend us to friends and neighbors without hesitation. Now that’s high praise!

Posted on Google Google
Divya Kulkarni profile picture
Divya Kulkarni
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Five stars all the way! Adam did a fantastic job replacing our HVAC — professional, knowledgeable, and tidy, and he took the time to explain everything along the way. Dave's Residential Electrical and Air Conditioning made the whole process smooth from start to finish, and owner Javier clearly runs a company that cares about doing the job right. Our new system is running beautifully. Highly recommend!
Posted on Google Google
Diane Ludewig profile picture
Diane Ludewig
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Adam is the best! Efficient, knowledgeable, considerate… represents Dave’s extremely well!
Posted on Google Google
Janet Lynn Parker profile picture
Janet Lynn Parker
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Dave's provides excellent , dependable service. Adam is a great technician. Honest service and products provided at a good price.
Posted on Google Google
Sherry Brown profile picture
Sherry Brown
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
I am a realtor and I have had the pleasure of working with Dave’s heating and air for a few of my real estate clients. The team has replaced water heaters, serviced HVAC systems and been a 2nd opinion when needed! Highly recommend having this company as a vendor if you are an agent!
Posted on Google Google
Tanya Clarke profile picture
Tanya Clarke
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Adam and his team were very professional and friendly. Once the water heater was installed he walked me through the installation process, showed me how it functions and gave tips for maintenance etc.
Posted on Google Google
Pauline Montague profile picture
Pauline Montague
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
From the initial, timely estimate to the install everyone at Dave's was very responsive. The install was seamless and the cleanup was excellent. Even though I know next to nothing about HVAC systems, Adam never let me feel like my questions were silly. I would highly recommend this company for all of your HVAC needs.
Posted on Google Google
Paul Curylo profile picture
Paul Curylo
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
These guys were prompt, professional, fast, and attentive from initial contact to system startup. Highly recommend them for your needs.
Posted on Google Google
Greg Stavrou profile picture
Greg Stavrou
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Dave’s did a great job replacing my old gas hot water heater! Professional and clean work with a choice of Bradford White and AO Smith 75 gallon in stock. Excellent planning visit, quoting and contracting process. Even a follow up to make sure we are happy! Thank you Dave’s!
Posted on Google Google
Jason G profile picture
Jason G
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Adam did an excellent job replacing my water heater. He was professional, courteous, and respectful of my home throughout the entire installation. He took care to keep everything clean and made sure there was no mess left behind. I also really appreciated that he kept me updated throughout the process and explained what he was doing along the way. Once the installation was complete, his team walked me through everything that had been done and made sure I understood the new system before he left. Overall, it was a great experience. Adam was knowledgeable, professional, and easy to work with. I would definitely recommend him.
Posted on Google Google
浅川 Asakawaめぐみ Megumi profile picture
浅川 Asakawaめぐみ Megumi
Google star 1Google star 2Google star 3Google star 4Google star 5Trustindex verifies that the original source of the review is Google.
Today, Adam came to install two UV units. We have been with Dave’s Heating & Air Company for more than 20 years, even through a change in ownership. We still recognize many of their technicians from the old days. Adam is very knowledgeable about HVAC systems. He is friendly, professional, and clearly takes pride in his work. We were very pleased and grateful to have him help us. Dave’s company is lucky to have employees like Adam.