Top-rated heating and air conditioning pros.

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

There are 24 highly-rated local heating and air conditioning pros.

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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon473
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Marriottsville

"Very well. They were very professional and efficient."

Barbara B on January 2023

When you need A/C, heating, or plumbing services, look no further than Horizon Services. For nearly 30 years, we’ve been the trusted name in plumbing, heating, and air conditioning, offering an unmatched level of service at reasonable rates.

"Very well. They were very professional and efficient."

Barbara B on January 2023


"Very responsive. Expected a much higher bill"

Ronald L on November 2020

We are not happy unless you are happy! We look forward to bringing you our quality of work and excellence to your homes. Why would you look anywhere else?

"Very responsive. Expected a much higher bill"

Ronald L on November 2020


Stiffler's Electric Service

4.96(
98
)
Approved Pro

Stiffler's Electric Service

4.96(
98
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
23 years of experience

Since 1979, Stiffler's Electric Service has been providing good quality work. Call on us � we get the work done. Our professional staff will make sure that all of your electrical needs are met with the best quality customer service and excellence in electrical craftsmanship. Call David today!

"David Stiffler was awesome. Found the source of the problem, fixed it in a timely manner, was reasonably priced, and just an overall great guy."

Tiffany A on May 2024

Since 1979, Stiffler's Electric Service has been providing good quality work. Call on us � we get the work done. Our professional staff will make sure that all of your electrical needs are met with the best quality customer service and excellence in electrical craftsmanship. Call David today!

"David Stiffler was awesome. Found the source of the problem, fixed it in a timely manner, was reasonably priced, and just an overall great guy."

Tiffany A on May 2024


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
243 local quotes requested

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


Avatar for Carroll Mechanical, Inc.

Carroll Mechanical, Inc.

4.65(
10
)
Approved Pro

Carroll Mechanical, Inc.

4.65(
10
)
Approved Pro
Super Service Award
Customers say: Quick response
156 local quotes requested
25 years of experience

Carroll Mechanical is an HVAC contractor that is dedicated to providing clients with the very best maintenance, repair, and installation services. We are based in Eldersburg and service customers throughout the MD region. We are a local business that is built on integrity, transparent pricing, and technical excellence. Our team of expert technicians have experience working with all major manufacturers. Our mission is to keep you comfortable and we proudly offer emergency availability where possible. If you are a homeowner, property manager, or business owner, give us a call today to learn more!

"I got quotes from a few different contractors. Carroll Mechanical’s was very competitive. It was the best value so I decided to go with them. The installers were prompt and did a fantastic job. The new system works great and they walked me through everything before they left. I have an ongoing maintenance so I know they will continue taking care of the new unit and making sure it works well. Overall, very happy with my choice. "

Ronald W on November 2025

Carroll Mechanical is an HVAC contractor that is dedicated to providing clients with the very best maintenance, repair, and installation services. We are based in Eldersburg and service customers throughout the MD region. We are a local business that is built on integrity, transparent pricing, and technical excellence. Our team of expert technicians have experience working with all major manufacturers. Our mission is to keep you comfortable and we proudly offer emergency availability where possible. If you are a homeowner, property manager, or business owner, give us a call today to learn more!

"I got quotes from a few different contractors. Carroll Mechanical’s was very competitive. It was the best value so I decided to go with them. The installers were prompt and did a fantastic job. The new system works great and they walked me through everything before they left. I have an ongoing maintenance so I know they will continue taking care of the new unit and making sure it works well. Overall, very happy with my choice. "

Ronald W on November 2025


Avatar for Holtzople Heating, Air Conditioning, & Electrical Services

Holtzople Heating, Air Conditioning, & Electrical Services

4.94(
176
)
Approved Pro

Holtzople Heating, Air Conditioning, & Electrical Services

4.94(
176
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
52 local quotes requested

Holtzople is a leading HVAC company in Frederick, Carroll, and Washington counties in Maryland, as well as Adams and small parts of Franklin & York counties in Pennsylvania, featuring all the top brands in the Heating and Cooling industry, such as Trane, Bryant, Lennox, Carrier, ClimateMaster, WaterFurnace, and more. We recently added an electrical department to our services, making us your one-stop shop for HVAC and electrical needs. Quality is Not Expensive, It's Priceless!

"Happy Holidays all! Please use my Holtzople (H) review to help you address your HVAC needs! Last summer, my Trane AC unit failed. Corey W (H) was the tech that came out to the house and troubleshooted/resolved the problem (leaking refrigerant). He also advised on probability of future repairs. Sadly, the unit performed well for only a short time before failing. It was time to consider my options. Repairs were becoming more frequent and costly. Tyler (H System Designer) visited and walked around my house inspecting my current HVAC system. We discussed repairing or replacing my ailing AC unit. He recommended replacing with a split ductless system and emailed a quote for 1. Enhanced Mitsubishi hyper heat mini split system (system) 2. Favorable financing options - low interest rates and affordable monthly payments. The install took a week. H’s crew arrived each morning, respected my property, and worked as a team to carefully install the new system. With gratitude, John"

John M on November 2025

Holtzople is a leading HVAC company in Frederick, Carroll, and Washington counties in Maryland, as well as Adams and small parts of Franklin & York counties in Pennsylvania, featuring all the top brands in the Heating and Cooling industry, such as Trane, Bryant, Lennox, Carrier, ClimateMaster, WaterFurnace, and more. We recently added an electrical department to our services, making us your one-stop shop for HVAC and electrical needs. Quality is Not Expensive, It's Priceless!

"Happy Holidays all! Please use my Holtzople (H) review to help you address your HVAC needs! Last summer, my Trane AC unit failed. Corey W (H) was the tech that came out to the house and troubleshooted/resolved the problem (leaking refrigerant). He also advised on probability of future repairs. Sadly, the unit performed well for only a short time before failing. It was time to consider my options. Repairs were becoming more frequent and costly. Tyler (H System Designer) visited and walked around my house inspecting my current HVAC system. We discussed repairing or replacing my ailing AC unit. He recommended replacing with a split ductless system and emailed a quote for 1. Enhanced Mitsubishi hyper heat mini split system (system) 2. Favorable financing options - low interest rates and affordable monthly payments. The install took a week. H’s crew arrived each morning, respected my property, and worked as a team to carefully install the new system. With gratitude, John"

John M on November 2025


Avatar for Tim Kyle Electric Heating & Cooling

Tim Kyle Electric Heating & Cooling

4.94(
343
)
Approved Pro

Tim Kyle Electric Heating & Cooling

4.94(
343
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
215 local quotes requested

At Tim Kyle Electric, Heating & Cooling, we believe that honesty, respect, and integrity are important. That’s why we have up-front pricing. You approve the price before we start your job. We also respect your home. All of our employees have to pass drug tests and background checks before they begin employment with us. All of our electricians are professionally trained and uniformed service technicians.

"Luis and Tom were outstanding! Not only did they address the issues we had, which precipitated the initial call, but several others we thought about while they were here. Both were courteous, personable and, because of some unusual wiring, creative with their solutions."

Bill H on November 2025

At Tim Kyle Electric, Heating & Cooling, we believe that honesty, respect, and integrity are important. That’s why we have up-front pricing. You approve the price before we start your job. We also respect your home. All of our employees have to pass drug tests and background checks before they begin employment with us. All of our electricians are professionally trained and uniformed service technicians.

"Luis and Tom were outstanding! Not only did they address the issues we had, which precipitated the initial call, but several others we thought about while they were here. Both were courteous, personable and, because of some unusual wiring, creative with their solutions."

Bill H on November 2025


Avatar for Carroll Mechanical, Inc.

Carroll Mechanical, Inc.

5.00(
12
)
Approved Pro

Carroll Mechanical, Inc.

5.00(
12
)
Approved Pro
Customers say: Quick response
98 local quotes requested
25 years of experience

Carroll Mechanical is an HVAC contractor that is dedicated to providing clients with the very best maintenance, repair, and installation services. We are based in Eldersburg and service customers throughout the MD region. We are a local business that is built on integrity, transparent pricing, and technical excellence. Our team of expert technicians have experience working with all major manufacturers. Our mission is to keep you comfortable and we proudly offer emergency availability where possible. If you are a homeowner, property manager, or business owner, give us a call today to learn more!

"Very efficient, on time and professional "

Ping Z on August 2025

Carroll Mechanical is an HVAC contractor that is dedicated to providing clients with the very best maintenance, repair, and installation services. We are based in Eldersburg and service customers throughout the MD region. We are a local business that is built on integrity, transparent pricing, and technical excellence. Our team of expert technicians have experience working with all major manufacturers. Our mission is to keep you comfortable and we proudly offer emergency availability where possible. If you are a homeowner, property manager, or business owner, give us a call today to learn more!

"Very efficient, on time and professional "

Ping Z on August 2025


Avatar for MARYLAND HEATING & COOLING

MARYLAND HEATING & COOLING

4.94(
89
)
Approved Pro

MARYLAND HEATING & COOLING

4.94(
89
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
36 local quotes requested

Welcome to Maryland Heating & Cooling, a family-owned & operated business located in Ellicott City, MD. With over 25 years in business, we are very proud to be recognized as one of the top-rated HVAC professionals in Howard County and surrounding areas. With a commitment to customer satisfaction, our team of skilled licensed technicians are dedicated in providing you with reliable heating and cooling solutions. We specialize in system replacement, repairs, maintenance and indoor air quality products. Along with our service, you can always count on Maryland Heating & Cooling to provide you with quick service, fair pricing and an honest evaluation of your HVAC system. We look forward to helping you with your HVAC needs.

"Couldn't be more pleased. Quick to respond, great communication and super friendly and professional service. Highly recommend"

Edward C on August 2025

Welcome to Maryland Heating & Cooling, a family-owned & operated business located in Ellicott City, MD. With over 25 years in business, we are very proud to be recognized as one of the top-rated HVAC professionals in Howard County and surrounding areas. With a commitment to customer satisfaction, our team of skilled licensed technicians are dedicated in providing you with reliable heating and cooling solutions. We specialize in system replacement, repairs, maintenance and indoor air quality products. Along with our service, you can always count on Maryland Heating & Cooling to provide you with quick service, fair pricing and an honest evaluation of your HVAC system. We look forward to helping you with your HVAC needs.

"Couldn't be more pleased. Quick to respond, great communication and super friendly and professional service. Highly recommend"

Edward C on August 2025


Avatar for No-Frost Air Conditioning & Heating, LLC

No-Frost Air Conditioning & Heating, LLC

4.77(
400
)
Approved Pro

No-Frost Air Conditioning & Heating, LLC

4.77(
400
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
91 local quotes requested

Family owned & operated. Additional contact name - Eileen Bangs - Award winning. Additional Licensing Information: MD Master Gas Fitter 6631. Baltimore County License: JG9033. Howard County License: G-9018. Carroll County License: P00068G. Electrical Licensing - Howard County License: 390, Baltimore County License: 547. MHIC12699.

"My system was working fine before the technician arrived. Afterwards my system failed. I contacted this company based upon Angis List recommendations. The technician talked me out of the services I requested and left me with an non working system."

Adi G on August 2023

Family owned & operated. Additional contact name - Eileen Bangs - Award winning. Additional Licensing Information: MD Master Gas Fitter 6631. Baltimore County License: JG9033. Howard County License: G-9018. Carroll County License: P00068G. Electrical Licensing - Howard County License: 390, Baltimore County License: 547. MHIC12699.

"My system was working fine before the technician arrived. Afterwards my system failed. I contacted this company based upon Angis List recommendations. The technician talked me out of the services I requested and left me with an non working system."

Adi G on August 2023

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Heating and Air Conditioning questions, answered by experts

Yes. Getting a whole-house dehumidifier can help you save money on energy bills. How? Your home automatically feels cooler when there’s less humidity in the air (“It’s the humidity that gets ya!” is such a true statement). This means that you won’t need to run your AC as much as you would if you had all that extra humidity in your home.

Most HVAC companies recommend against setting your AC below 70 as it could freeze up the system and cause more problems. Regardless of how hot it is outside, there is generally a 20 degree difference between the outside and inside temperatures, so even if it’s 100 degrees outside, your AC will likely not be able to cool your home to 70 degrees.

No. Evaporator coils are designed to work with specific refrigerant types, and they are rated by what kinds of refrigerant they use. It’s indicated with an “R” code. It’s important to match your evaporator coil and refrigerant or your system will not work properly. An AC technician can tell you what type of refrigerant your system needs and what evaporator coils will work with it.

The compressor is the heart of your AC system and is one of the most important parts required to keep it functioning properly. If your AC unit is making a popping, banging, clanging, clicking, or screeching sound, it could point to a problem with the compressor. If the unit is physically vibrating, that can also be an indication that your AC compressor is going bad.

Whether an HVAC damper should be open or closed depends on the season, the zone it controls, and the temperature in that zone. In the summer, open upstairs dampers and close lower-level dampers to get the most efficient cooling possible. In the winter, do the opposite. Cool air will naturally flow down to lower levels, while warm air will rise. This keeps your system from working harder and helps prevent common AC problems.

The Marriottsville, 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.

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