Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Lothian, MD

Enter your zip and get matched with up to 5 pros

TRUSTED BY LOTHIAN, MD HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon97
    Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Lothian, MD

*The Angi rating for Heating And Air Conditioning Service companies in Lothian, 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 Lothian, 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 January 22, 2026

Find Heating and air conditioning pros in Lothian

Avatar for Duke's Electrical Services, Inc.

Duke's Electrical Services, Inc.

4.91(
293
)
•Approved Pro

Duke's Electrical Services, Inc.

4.91(
293
)
•Approved Pro
Customers say: True professional
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
25 years of experience

Duke's Electrical Services is a small, family owned and operated business. The owner, a master electrician, preformes all the work personally to ensure the highest quality workmanship.

"We had a great experience with them! Super communicative, great price and super quick. Highly recommend"

Lucie B on December 2024

Duke's Electrical Services is a small, family owned and operated business. The owner, a master electrician, preformes all the work personally to ensure the highest quality workmanship.

"We had a great experience with them! Super communicative, great price and super quick. Highly recommend"

Lucie B on December 2024

Avatar for GAC Services

GAC Services

4.86(
269
)
•Approved Pro

GAC Services

4.86(
269
)
•Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
56 years of experience

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"The technician that was tasked with the job was very knowledgeable and professional."

Kenneth B on January 2026

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"The technician that was tasked with the job was very knowledgeable and professional."

Kenneth B on January 2026

Avatar for Sila Heating, Cooling and Plumbing

Sila Heating, Cooling and Plumbing

4.75(
1,971
)
•Approved Pro

Sila Heating, Cooling and Plumbing

4.75(
1,971
)
•Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
37 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"They charged $98 to come give me an estimate for swapping our a shower valve cartridge, which was fine, but the pricing they provided was completely unreasonable, $1,000. They were unwilling to provide any detail for the price. I ended up buy the part myself for $30 and replaced it in 30 minutes."

Tom A on October 2024

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"They charged $98 to come give me an estimate for swapping our a shower valve cartridge, which was fine, but the pricing they provided was completely unreasonable, $1,000. They were unwilling to provide any detail for the price. I ended up buy the part myself for $30 and replaced it in 30 minutes."

Tom A on October 2024

Avatar for Grove Heating and Cooling Inc

Grove Heating and Cooling Inc

4.80(
142
)
•Approved Pro

Grove Heating and Cooling Inc

4.80(
142
)
•Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
22 years of experience

Family Owned & Operated, Grove Heating and Cooling, Inc. specializes in designing, engineering and installing complete comfort systems for homeowners and commercial property owners. Gary, his sons and a team of trained professionals bring over 50 years of experience in the HVAC industry, offering unmatched quality, exceptional customer service and family-like treatment to all our customers.

"Great fast and professional"

Lyndon A on November 2024

Family Owned & Operated, Grove Heating and Cooling, Inc. specializes in designing, engineering and installing complete comfort systems for homeowners and commercial property owners. Gary, his sons and a team of trained professionals bring over 50 years of experience in the HVAC industry, offering unmatched quality, exceptional customer service and family-like treatment to all our customers.

"Great fast and professional"

Lyndon A on November 2024

Avatar for L&V HANDYMAN AND REMODELING

L&V HANDYMAN AND REMODELING

5.00(
28
)
•Approved Pro

L&V HANDYMAN AND REMODELING

5.00(
28
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 years of experience

We have the experience and dedication to get the job done right! Specializing in handyman services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!

"I have hired this company for a number of things, including doors, floors, backsplash, etc. he is very fair with his prices and very good with his work. I would hire him again if I need anything done, and I totally approve of everything he has done for me and encourage others to hire him."

Bernie M on August 2025

We have the experience and dedication to get the job done right! Specializing in handyman services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!

"I have hired this company for a number of things, including doors, floors, backsplash, etc. he is very fair with his prices and very good with his work. I would hire him again if I need anything done, and I totally approve of everything he has done for me and encourage others to hire him."

Bernie M on August 2025

Avatar for Bamford Plumbing and Heating Inc

Bamford Plumbing and Heating Inc

4.97(
59
)
•Approved Pro

Bamford Plumbing and Heating Inc

4.97(
59
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
17 years of experience

**SPECIALIZING IN BOILER REPAIR AND REPLACEMENT** ** WE OFFER 24/7 EMERGENCY SERVICE** Bamford Plumbing & Heating Inc. has been providing excellent customer service since 2009. We are a family owned and operated company with over ten years of experience in the plumbing and heating industry. We are licensed and insured in the State of Maryland. We offer 24 hour emergency service and free estimates on new work.

"Great. Doug answered our inquiry promptly and fixed our issue the next day for significantly less than the first quote."

Kevin C on January 2025

**SPECIALIZING IN BOILER REPAIR AND REPLACEMENT** ** WE OFFER 24/7 EMERGENCY SERVICE** Bamford Plumbing & Heating Inc. has been providing excellent customer service since 2009. We are a family owned and operated company with over ten years of experience in the plumbing and heating industry. We are licensed and insured in the State of Maryland. We offer 24 hour emergency service and free estimates on new work.

"Great. Doug answered our inquiry promptly and fixed our issue the next day for significantly less than the first quote."

Kevin C on January 2025

Avatar for Beltway Air Conditioning, Heating & Plumbing

Beltway Air Conditioning, Heating & Plumbing

4.84(
61
)
•Approved Pro

Beltway Air Conditioning, Heating & Plumbing

4.84(
61
)
•Approved Pro
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
19 years of experience

Beltway Air Conditioning & Heating , LLC, is a family owned and operated business located in Hanover. We offer everything you need to heat, cool, and improve your indoor air quality in every corner of your home. Our high quality work with a smile is what keeps our customers satisfied. We make sure that we pay close attention to the details and take pride in delivering professional results to you at competitive rates.

"BELTWAY AIR COMFORT SERVICE is a terrible company. Horrible customer service. Incompetent technicians. They came to my home when my AC broke and 13 days later still no update. I called and texted repeatedly and got no response from the company. It's been two weeks in the sweltering heat we still have no AC. First they said they had to order a part, then I they found out they hadn't put the order in for the part. The dispatch was rude and claimed he didn't know who the owner was when I asked to speak to him. I found out these are the same ripoff artists that misdiagnosed my mom's HVAC resulting in her buying an entire new unit for over $10,000, and then the unit kept shutting off because the real problem was a regulator for the gas line. They're incompetent and unprofessional."

Karen B on June 2025

Beltway Air Conditioning & Heating , LLC, is a family owned and operated business located in Hanover. We offer everything you need to heat, cool, and improve your indoor air quality in every corner of your home. Our high quality work with a smile is what keeps our customers satisfied. We make sure that we pay close attention to the details and take pride in delivering professional results to you at competitive rates.

"BELTWAY AIR COMFORT SERVICE is a terrible company. Horrible customer service. Incompetent technicians. They came to my home when my AC broke and 13 days later still no update. I called and texted repeatedly and got no response from the company. It's been two weeks in the sweltering heat we still have no AC. First they said they had to order a part, then I they found out they hadn't put the order in for the part. The dispatch was rude and claimed he didn't know who the owner was when I asked to speak to him. I found out these are the same ripoff artists that misdiagnosed my mom's HVAC resulting in her buying an entire new unit for over $10,000, and then the unit kept shutting off because the real problem was a regulator for the gas line. They're incompetent and unprofessional."

Karen B on June 2025

Avatar for Linares Construction Llc

Linares Construction Llc

5.00(
20
)
•Approved Pro

Linares Construction Llc

5.00(
20
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 years of experience

We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"Excellent work. Tremendous attention to detail. Could not have asked for a more professional job. Always arrived on time and cleanup was outstanding. Would hire again"

Fred S on October 2025

We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule an estimate today!

"Excellent work. Tremendous attention to detail. Could not have asked for a more professional job. Always arrived on time and cleanup was outstanding. Would hire again"

Fred S on October 2025

Avatar for 3MMECHANICAL

3MMECHANICAL

5.00(
22
)
•Approved Pro

3MMECHANICAL

5.00(
22
)
•Approved Pro
Super Service Award
Customers say: Quick response
6 years of experience
Emergency services offered

Our mission at 3MMechanical is to continue the growth of our business by doing right by all of our clients. We love seeing that one of a kind smile on a home owners face at the end of a project! 3MMechanical stacks up with the competition and surpasses it with competitive prices, second to none workmanship and a prompt/responsive team! We give you quality that you can measure, and a finished product that will enhance your home forever. Call us today!

"3MMechanical provides excellent customer service. He's reliable, efficient, knowledgeable, and goes out of his way to ensure there job is done professionally and cost effectively."

Aaron L on December 2025

Our mission at 3MMechanical is to continue the growth of our business by doing right by all of our clients. We love seeing that one of a kind smile on a home owners face at the end of a project! 3MMechanical stacks up with the competition and surpasses it with competitive prices, second to none workmanship and a prompt/responsive team! We give you quality that you can measure, and a finished product that will enhance your home forever. Call us today!

"3MMechanical provides excellent customer service. He's reliable, efficient, knowledgeable, and goes out of his way to ensure there job is done professionally and cost effectively."

Aaron L on December 2025

Avatar for JDL HVAC & Plumbing Services

JDL HVAC & Plumbing Services

4.63(
879
)
•Approved Pro

JDL HVAC & Plumbing Services

4.63(
879
)
•Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
16 years of experience

When it comes to great service, customers know they can count on JDL HVAC Services, for all of their home comfort needs. We don't guess and send quotes before the time of service. We quote all repairs or estimate for system replacement, after the system has been evaluated accurately by one of 5 Star Technician. That way we are able to give you an accurate and competitive quote or estimate, with no surprises. We are transparent with our customers, letting them know the best option for their comfort needs. Discover why more and more new customers choose JDL HVAC Services every year. You can be sure of quality heating and cooling solutions from repairs, too new system installations, that will take care of all your HVAC needs. We are fully licensed and insured, so you can rest assured that you are getting the best of the best working in your home.

"Quick response. Clear explanation. Highly recommend "

Derek A on June 2025

When it comes to great service, customers know they can count on JDL HVAC Services, for all of their home comfort needs. We don't guess and send quotes before the time of service. We quote all repairs or estimate for system replacement, after the system has been evaluated accurately by one of 5 Star Technician. That way we are able to give you an accurate and competitive quote or estimate, with no surprises. We are transparent with our customers, letting them know the best option for their comfort needs. Discover why more and more new customers choose JDL HVAC Services every year. You can be sure of quality heating and cooling solutions from repairs, too new system installations, that will take care of all your HVAC needs. We are fully licensed and insured, so you can rest assured that you are getting the best of the best working in your home.

"Quick response. Clear explanation. Highly recommend "

Derek A on June 2025

...
Showing 1-10 of 1137
Heating and Air Conditioning questions, answered by experts

Set your house temperature between 55 and 85 degrees Fahrenheit while on vacation, depending on the season. If it’s winter, don’t go below 55 degrees. In the summer, the best AC temperature for energy savings is no higher than 85 degrees. You can save anywhere from 10% to 15% on your energy costs by adjusting the temperature while you’re away. If you have a smart thermostat, set up vacation modes for each season. On your way home, turn off vacation mode to allow the home to warm up or cool down before you arrive.

If possible, avoid placing furniture in front of a return air vent. A blocked air vent can cause your HVAC system to use more energy, which in turn can lower the life span of your unit and raise your energy bill. Furniture can also trap hot or cold air, damaging your furniture or appliances. 

Professional duct installers suggest leaving between six and 12 inches of space in front of an air return vent. If you must place furniture in front of a return air vent, try to aim for putting furniture over a floor vent instead of in front of a wall vent, and avoid draping curtains over any vent system.

Signs that your air conditioner capacitor is malfunctioning include a smell or smoke coming from the unit, a humming or banging noise when it starts, the system shutting off randomly, higher energy bills, and no cold air blowing out of the unit. Additionally, if your capacitor is bad, the air conditioner may not turn on at all. 

There are several AC unit problems to troubleshoot, but luckily you can identify them by keeping a close eye on your system. Look out for the following signs that your AC needs repair:

  • Unusual noises during operation

  • AC unit blows warm air

  • AC unit doesn’t come on or turn off with temperature changes

  • Strange odors come through the vents

  • AC unit cycles on and off rapidly

  • Indoor air is more humid or less comfortable than usual

  • AC unit keeps tripping your breaker

  • Fan in the outdoor compressor doesn’t operate when the AC is on

Fixing a leak in an AC unit costs $200 to $1,600, depending on the type of leak and any related damage. But depending on the age and condition of your AC, it might make more sense to replace the AC unit instead of repairing it. If your AC is only a few years old and relatively problem-free, then repairing it is the right call. But if it’s nearing a decade old and has other issues, consider replacing it.

The Lothian, MD 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.

See all articles

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"