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TRUSTED BY DUNDALK, MD HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon586
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Dundalk

Avatar for Hamilton Plumbing, Heating & Air Conditioning

Hamilton Plumbing, Heating & Air Conditioning

4.94(
126
)
•Approved Pro

Hamilton Plumbing, Heating & Air Conditioning

4.94(
126
)
•Approved Pro
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
47 years of experience

Hamilton Plumbing and Heating Co is a family owned and operated business serving the community since 1978! Offering superior quality work and excellent customer service. We are licensed and trained professionals in Plumbing, Heating and Air Conditioning. Specializing in Water Heaters.

"Deceptive. Installed defective equipment then disappeared"

Elam K on November 2025

Hamilton Plumbing and Heating Co is a family owned and operated business serving the community since 1978! Offering superior quality work and excellent customer service. We are licensed and trained professionals in Plumbing, Heating and Air Conditioning. Specializing in Water Heaters.

"Deceptive. Installed defective equipment then disappeared"

Elam K on November 2025

Avatar for Portillo Home Remodeling

Portillo Home Remodeling

4.98(
47
)
•Approved Pro

Portillo Home Remodeling

4.98(
47
)
•Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
2 years of experience

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"He was on time and did an excellent job with some minor carpentry repairs we needed done. Mr. Portillo was very polite and did exactly as we asked. He was very thorough in completing the work. "

Kathleen L on December 2025

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"He was on time and did an excellent job with some minor carpentry repairs we needed done. Mr. Portillo was very polite and did exactly as we asked. He was very thorough in completing the work. "

Kathleen L on December 2025

Avatar for Pure Air HVAC, LLC

Pure Air HVAC, LLC

4.90(
67
)
•Approved Pro

Pure Air HVAC, LLC

4.90(
67
)
•Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

Pure Air HVAC, LLC, is dedicated to providing our clients with the very best in installation, service and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients and guarantee your satisfaction. Carrier is our preferred brand as it provides the most reliable systems and highest efficiencies.

"we had a Bosch boiler hot water combo system installed in the spring of last year for $9500. We used the heating system on some cool days and nights, so it seemed to do the job of heating our home. This year is the first time we have used it for the entire winter. If the temperatures are mild the system works okay. If the temperature drops below 30 degrees it will not heat our home. We were able to keep the house warm thanks to our pellet stove. In Hine sight, We wish we would have stayed with the conventional boiler system for about half of what we paid for this inadequate system. buyers know what you are getting into before you buy."

Richard A on February 2023

Pure Air HVAC, LLC, is dedicated to providing our clients with the very best in installation, service and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients and guarantee your satisfaction. Carrier is our preferred brand as it provides the most reliable systems and highest efficiencies.

"we had a Bosch boiler hot water combo system installed in the spring of last year for $9500. We used the heating system on some cool days and nights, so it seemed to do the job of heating our home. This year is the first time we have used it for the entire winter. If the temperatures are mild the system works okay. If the temperature drops below 30 degrees it will not heat our home. We were able to keep the house warm thanks to our pellet stove. In Hine sight, We wish we would have stayed with the conventional boiler system for about half of what we paid for this inadequate system. buyers know what you are getting into before you buy."

Richard A on February 2023

K&K Electric

4.94(
31
)
•Approved Pro

K&K Electric

4.94(
31
)
•Approved Pro
Customers say: Quick response
18 years of experience
Free onsite estimate

K&K Electric has over 20 years in the industry. There isn't a job too big or small for our highly qualified staff. We care about our customers and what they need from us. Give us a call today for all your electrical needs!

"Job was done and was very knowledgeable and affordable. Communication was great and will recommend him to other’s! "

Princess W on October 2025

K&K Electric has over 20 years in the industry. There isn't a job too big or small for our highly qualified staff. We care about our customers and what they need from us. Give us a call today for all your electrical needs!

"Job was done and was very knowledgeable and affordable. Communication was great and will recommend him to other’s! "

Princess W on October 2025

Avatar for Heating & Cooling Certified Mechanic

Heating & Cooling Certified Mechanic

4.97(
32
)
•Approved Pro

Heating & Cooling Certified Mechanic

4.97(
32
)
•Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
Free onsite estimate

With over a decade of experience, Heating & Cooling Certified Mechanic is professionally licensed and dedicated to ensure your HVAC service/install exceeds your expectations! We specialize in HVAC services, repairs and we guarantee your satisfaction! We will not leave until the job is done right! We pride ourselves on the quality of work we provide, while delivering great customer service! Call or click for your FREE estimate today! HVAC, Water Heater, Air Quality System Installations, Repairs & More Need repair? Call Today, Need Installation or a 2nd Opinion? Call Today. 24 Hour Service CALL TODAY! CALL TONIGHT!

"The estimate process went very smoothly. The proposal was well written & allowed electronic signature. Communication leading up to the install date was timely and professional. The work was completed on time and correctly. The installation team was friendly and competent."

Stanley R on July 2025

With over a decade of experience, Heating & Cooling Certified Mechanic is professionally licensed and dedicated to ensure your HVAC service/install exceeds your expectations! We specialize in HVAC services, repairs and we guarantee your satisfaction! We will not leave until the job is done right! We pride ourselves on the quality of work we provide, while delivering great customer service! Call or click for your FREE estimate today! HVAC, Water Heater, Air Quality System Installations, Repairs & More Need repair? Call Today, Need Installation or a 2nd Opinion? Call Today. 24 Hour Service CALL TODAY! CALL TONIGHT!

"The estimate process went very smoothly. The proposal was well written & allowed electronic signature. Communication leading up to the install date was timely and professional. The work was completed on time and correctly. The installation team was friendly and competent."

Stanley R on July 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
16 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 Paramount Heating & Air Conditioning, LLC

Paramount Heating & Air Conditioning, LLC

4.88(
110
)
•Approved Pro

Paramount Heating & Air Conditioning, LLC

4.88(
110
)
•Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 years of experience

Paramount Heating & Air Conditioning, LLC, is a locally-owned and family-operated business, with 30 years in the industry. We are able to help you with all your HVAC repair needs!

"The Technician was very professional and informative."

Janet Q on October 2020

Paramount Heating & Air Conditioning, LLC, is a locally-owned and family-operated business, with 30 years in the industry. We are able to help you with all your HVAC repair needs!

"The Technician was very professional and informative."

Janet Q on October 2020

Avatar for Reliability Home, LLC

Reliability Home, LLC

4.63(
853
)
•Approved Pro

Reliability Home, LLC

4.63(
853
)
•Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
18 years of experience

Reliability Home has a single mission: Customer Satisfaction! We deliver on our promise by having experienced and professional Service Technicians and Office Staff. We focus on the needs of our customers, providing personalized attention and a stress-free experience. This approach has set us apart and made us one of the leading Heating and Air Conditioning companies in Maryland. Hello, I'm Robert Matheny, the Operations Manager here at Reliability Home. When you hire Reliability Home, you are joining our family of satisfied customers. Give us a call today!

"They were very tolerant of my blubbering phone calls wondering about a timeline with regards to when the second tech would get to me with the part. Both techs were awesome!"

Suzanne D on September 2023

Reliability Home has a single mission: Customer Satisfaction! We deliver on our promise by having experienced and professional Service Technicians and Office Staff. We focus on the needs of our customers, providing personalized attention and a stress-free experience. This approach has set us apart and made us one of the leading Heating and Air Conditioning companies in Maryland. Hello, I'm Robert Matheny, the Operations Manager here at Reliability Home. When you hire Reliability Home, you are joining our family of satisfied customers. Give us a call today!

"They were very tolerant of my blubbering phone calls wondering about a timeline with regards to when the second tech would get to me with the part. Both techs were awesome!"

Suzanne D on September 2023

Avatar for At Your Service Heating & Cooling, LLC

At Your Service Heating & Cooling, LLC

4.72(
148
)
•Approved Pro

At Your Service Heating & Cooling, LLC

4.72(
148
)
•Approved Pro
Customers say: True professional
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
12 years of experience

At Your Service Heating & Cooling LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Response was great and finished job in one day."

mark l on December 2025

At Your Service Heating & Cooling LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

"Response was great and finished job in one day."

mark l on December 2025

Avatar for Pohlman Plumbing Inc

Pohlman Plumbing Inc

4.63(
38
)
•Approved Pro

Pohlman Plumbing Inc

4.63(
38
)
•Approved Pro
Customers say: Quick response
17 years of experience
Free onsite estimate

Pohlman Plumbing is a local, family-owned and -operated full-service plumbing and HVAC company serving the Baltimore metro area. Founded in 2008, our professional and friendly customer service plus our top-notch skills have made us one of the most trusted local plumbers in Baltimore. When you choose to work with Pohlman Plumbing, you can have peace of mind knowing we always stand by the Pohlman Promise: fast service, at a fair price, and done right the first time.

"The gentleman that work this business go above and beyond to make the best suggestions for they work required. This is the second time I have hired them. My sub pump went after and more rain was coming they came out with 2 hours to fix the problem. Extremely professional man. I will be er use any other plumbing business other than Pohlman. I highly recommend if you have a plumping issue."

Georgette T on January 2024

Pohlman Plumbing is a local, family-owned and -operated full-service plumbing and HVAC company serving the Baltimore metro area. Founded in 2008, our professional and friendly customer service plus our top-notch skills have made us one of the most trusted local plumbers in Baltimore. When you choose to work with Pohlman Plumbing, you can have peace of mind knowing we always stand by the Pohlman Promise: fast service, at a fair price, and done right the first time.

"The gentleman that work this business go above and beyond to make the best suggestions for they work required. This is the second time I have hired them. My sub pump went after and more rain was coming they came out with 2 hours to fix the problem. Extremely professional man. I will be er use any other plumbing business other than Pohlman. I highly recommend if you have a plumping issue."

Georgette T on January 2024

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

*The Angi rating for Heating And Air Conditioning Service companies in Dundalk, 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 Dundalk, 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 December 30, 2025

Heating and Air Conditioning questions, answered by experts

Yes, it’s normal for an AC to drip water. In fact, it’s part of the dehumidifying process that takes place inside your AC unit as the condensation trickles down into the drain pan. However, it isn’t normal for your AC to sound like it’s running water or have large puddles around it. If that happens, you can try the solutions listed above or call an AC repair pro.

To extend your HVAC system’s lifespan, it’s crucial to keep up with maintenance. This includes changing filters and thermostat batteries, keeping the outside unit clean and clear of clutter, and lubricating moving parts. Watch out for leaks, mold buildup, and blockages to ensure your unit stays in good working order. Spotting these issues early can be the difference between a simple, wallet-friendly repair and an expensive replacement.

A frosty expansion valve that isn't blowing out cool air is a sure sign that it’s time to replace it. It might also be time to replace the TXV valve if your AC unit switches off soon after turning on or if you have poor airflow in your home.

While most air conditioners can last between 10 and 20 years, they will only last this long (or longer) if properly taken care of. Routine maintenance and inspections help keep your AC unit running in tip-top shape but understanding what factors will decrease its lifespan will also help keep your unit running cool.

Some things that shorten your AC’s lifespan include:

  • Extreme outdoor conditions, like high humidity or extensive salt spray 

  • Improper installation

  • Extended run times, either by the unit being too small or the thermostat setting too low

  • Not performing required maintenance

If both your furnace and AC unit are more than a decade old, it may be a good idea to replace both of them. However, your furnace can last up to three decades, and your air conditioner can typically last up to 15 years, so consulting with a pro before deciding to replace both of them is best. If it’s before that time limit for each, you can fix many problems with repairs or just replace one.

The Dundalk, 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

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