4.6 
612 *The Angi rating for Heating And Air Conditioning Service companies in Dickerson, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Dickerson, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.
Last update on May 17, 2026
Serving Dickerson, MD and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1982
Free estimates
Emergency services offered
"German was polite, knowledgeable, took time to explain any issues, and did not try to upsell. I will ask for him the next time I need HVAC work done."
+6
Serving Dickerson, MD and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Found a simple solution to what I thought was a major HVAC problem that would have otherwise led me to replace the unit. Would definitely hire again."
Serving Dickerson, MD and surrounding areas
Approved (Corporate)
In business since 2000
Free estimates
Credit card accepted
"Good pricing and quick service. We used them for an HVAC unit in our former home last year and just called them back to install a unit in our new home."
Serving Dickerson, MD and surrounding areas
Approved
Credit card accepted
Customers say: True professional
"Excellent service from Hecomo. Technician did not try to push purchase of a new HVAC system even though there were major issues with our system, feel comfortable while talking with an advisor. Very knowledgeable, patiently, friendly and nice person, answer all my questions. Later on, we decided to replace the whole new system with fair price and wasn’t ripped off as others. Very professional and well trained technician. I will definitely use them again."
+8
Serving Dickerson, MD and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"I received six estimates for replacing my air conditioning system. Of the six, four came in at a reasonable price including the estimate from the Michael Bonsby Company. Three of the four estimators made a good impression but the one who impressed me the most was David Lux of Michael Bonsby. He spent the most time, provided the most information, and fully answered all of my questions in all of my contacts with him prior to signing the contract. Even after I signed the contract, had the system installed, and made final payment, David Lux was still very prompt in answering my inquiries. So far I am very happy with the air conditioning system installed by and I would highly recommend the Michael Bonsby Company if you ever need to replace your air conditioning system."
+3
Serving Dickerson, MD and surrounding areas
Approved
In business since 2012
Free estimates
Emergency services offered
"My outside HVAC unit was no longer working, however, everything on the inside of the house was. Isac W. was able to diagnose and solve the problem in a short amount of time. Isac was courteous and the price of the service was as expected. I would definitely recommend this business for your HVAC needs."
+73
Serving Dickerson, MD and surrounding areas
Approved
In business since 2016
Emergency services offered
Small jobs welcome
"Outstanding service and work. Very happy I chose them. I had an air handler/HVAC unit that was old and dirty. They came in, took it apart, cleaned/sprayed/lubricated the unit, put it back together, and it works so much better. Thank you!"
+66
Serving Dickerson, MD and surrounding areas
Approved (Corporate)
In business since 1903
Emergency services offered
Warranties offered
"I AM BUYING A HEATER SERVICE CONTRACT FROM PETRO THIS YEAR."
Serving Dickerson, MD and surrounding areas
Approved (Corporate)
In business since 1982
Free estimates
Emergency services offered
"Anthony Flint HVAC technician was very professional, found the probably and fixed it in timely fashion Excellent service!"
Serving Dickerson, MD and surrounding areas
Approved (Corporate)
In business since 1945
Free estimates
Emergency services offered
"This was a maintenance visit for the warm season on my recently installed new HVAC unit."
From average costs to expert advice, get all the answers you need to get your job done.
In the market for a new air conditioner in our nation’s capital? Check out this guide to learn how much AC replacement costs in Washington, D.C.
Heating and cooling system on the fritz? Discover the factors that go into HVAC repair costs in Washington, DC, and how you can save money on this project.
Want to switch to a more energy-efficient HVAC system in our nation’s capital? Get started by learning about average heat pump costs in Washington, D.C.
Retrofitting your house for AC is, surprisingly, not too hard. Here’s what you’ll need to consider to make it happen.
When temperatures run high outside, you want to be prepared to tackle the heat. Check out these 19 tips to stay cool without AC.
What is an air source heat pump, and is it right for you? Air source heat pumps are an effective and efficient home climate control solution. Read on for more information.
