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TRUSTED BY HARWOOD, MD HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon1.4k+
    Verified boiler repairs reviews

Find Boiler repair pros in Harwood

Avatar for Len The Plumber, LLC.

Len The Plumber, LLC.

4.25(
1,260
)
Approved Pro

Len The Plumber, LLC.

4.25(
1,260
)
Approved Pro
Customers say: Super punctual
479 local quotes requested
29 years of experience

Len The Plumber Heating & Air, LLC is a leading plumbing and drain company serving Central Maryland. Our certified professional plumbers are available same day to assist residential customers in Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Cecil County, Harford County, and Howard County. Our knowledgeable plumbers have years of experience dealing with a wide variety of plumbing issues including plumbing repairs, drain cleaning, water heaters, well systems, heating systems, sewer, water, and gas lines. We’re open 7 days a week with no extra charge on evenings or weekends!

"Don't waste your time because that's all this company will do is WASTE YOUR TIME. I had an appt for 10/20 between 8-12pm. Never got a call, nor a visit. Called to find out why an d was told that they sent a text informing of running late which I never got. Received callback from Nicole informing of non received text stating she would set up visit so that I would be 1st stop. I requested today 10/22 and was assured she personally would call me around 8:30am and tech would be here by 9am. It's now 9:37am and I've again yet to hear from Nicole nor a tech. DON'T WASTE YOUR TIME BECAUSE LEN THE PLUMBER SURE WILL WASTE YOUR TIME. UNPROFESSIONAL AND NOT RECOMMENDED!!!!!"

J. W on October 2025

Len The Plumber Heating & Air, LLC is a leading plumbing and drain company serving Central Maryland. Our certified professional plumbers are available same day to assist residential customers in Anne Arundel County, Baltimore City, Baltimore County, Carroll County, Cecil County, Harford County, and Howard County. Our knowledgeable plumbers have years of experience dealing with a wide variety of plumbing issues including plumbing repairs, drain cleaning, water heaters, well systems, heating systems, sewer, water, and gas lines. We’re open 7 days a week with no extra charge on evenings or weekends!

"Don't waste your time because that's all this company will do is WASTE YOUR TIME. I had an appt for 10/20 between 8-12pm. Never got a call, nor a visit. Called to find out why an d was told that they sent a text informing of running late which I never got. Received callback from Nicole informing of non received text stating she would set up visit so that I would be 1st stop. I requested today 10/22 and was assured she personally would call me around 8:30am and tech would be here by 9am. It's now 9:37am and I've again yet to hear from Nicole nor a tech. DON'T WASTE YOUR TIME BECAUSE LEN THE PLUMBER SURE WILL WASTE YOUR TIME. UNPROFESSIONAL AND NOT RECOMMENDED!!!!!"

J. W on October 2025


"Great! I called after hours and Rick was pleasant. He asked to text a picture of the leaking. Brad was here in the morning. One hour later he was finished The price was reasonable. Would definitely hire again"

Thomas S on December 2021

R & G Water Systems carries, installs, services and repairs well pumps and water treatment and conditioning systems for residential and light commercial application. We also deal with acid neutralizers.

"Great! I called after hours and Rick was pleasant. He asked to text a picture of the leaking. Brad was here in the morning. One hour later he was finished The price was reasonable. Would definitely hire again"

Thomas S on December 2021


Avatar for Aire Serv of Prince Georges County

Aire Serv of Prince Georges County

4.42(
12
)
Approved Pro

Aire Serv of Prince Georges County

4.42(
12
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
18 local quotes requested

Aire Serv Heating & Air Conditioning can provide many services to keep you and your family comfortable. A few of the products and services we can provide for your heating, cooling and indoor air quality needs are Service and Repair, System Maintenance, Advantage Member Plans, Replacement & Installation, Guarantees, Air Cleaning and Purification, Duct Sealing, Indoor Air Quality, Heating, Air Conditioning and Indoor Air Quality Products, and Commercial Services for your business. Our Exclusive Written Guarantees Are Designed to Protect You and Your Home Request a free home estimate, Design your own heating and cooling system, Shop for filters or accessories online, Request an In-Home Aire Quality Survey.

"repair of ac"

Monti B on July 2025

Aire Serv Heating & Air Conditioning can provide many services to keep you and your family comfortable. A few of the products and services we can provide for your heating, cooling and indoor air quality needs are Service and Repair, System Maintenance, Advantage Member Plans, Replacement & Installation, Guarantees, Air Cleaning and Purification, Duct Sealing, Indoor Air Quality, Heating, Air Conditioning and Indoor Air Quality Products, and Commercial Services for your business. Our Exclusive Written Guarantees Are Designed to Protect You and Your Home Request a free home estimate, Design your own heating and cooling system, Shop for filters or accessories online, Request an In-Home Aire Quality Survey.

"repair of ac"

Monti B on July 2025


Avatar for West Shore Home Baltimore

West Shore Home Baltimore

4.94(
364
)
Approved Pro

West Shore Home Baltimore

4.94(
364
)
Approved Pro
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
817 local quotes requested

To accomplish our mission, we have implemented a simple approach that will restore the beauty of your home while significantly reducing your energy bills - and we get it done in just one day! From start to finish, the West Shore Window & Door, Inc., experience is engineered to bring happiness to every home. The health and safety of our customers and employees is a top priority. Our team is following all CDC guidelines so we can provide you with the fast and convenient home improvements. We are also offering free virtual design consultations! Schedule your free consultation today.

"Excellent customer service. Excellent finished product. West Shore Home came to install a shower in one bathroom and bathtub/shower in another bathroom. Their customer service is top tier! They took extra caution to ensure they didn’t damage or disrupt my home or other furniture as they carried their equipment in and out of the house. They encouraged me to see the progress as they worked. (Nothing to hide is always a good thing.) When I expressed surprise and disappointment with one aspect of the design, they immediately began solutioning the issue."

Isiah T on January 2025

To accomplish our mission, we have implemented a simple approach that will restore the beauty of your home while significantly reducing your energy bills - and we get it done in just one day! From start to finish, the West Shore Window & Door, Inc., experience is engineered to bring happiness to every home. The health and safety of our customers and employees is a top priority. Our team is following all CDC guidelines so we can provide you with the fast and convenient home improvements. We are also offering free virtual design consultations! Schedule your free consultation today.

"Excellent customer service. Excellent finished product. West Shore Home came to install a shower in one bathroom and bathtub/shower in another bathroom. Their customer service is top tier! They took extra caution to ensure they didn’t damage or disrupt my home or other furniture as they carried their equipment in and out of the house. They encouraged me to see the progress as they worked. (Nothing to hide is always a good thing.) When I expressed surprise and disappointment with one aspect of the design, they immediately began solutioning the issue."

Isiah T on January 2025


"A passionate young man working in the industry."

Joy W on July 2021

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"A passionate young man working in the industry."

Joy W on July 2021


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
236 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 Remedy Plumbing & Drain Cleaning, LLC

Remedy Plumbing & Drain Cleaning, LLC

4.79(
681
)
Approved Pro

Remedy Plumbing & Drain Cleaning, LLC

4.79(
681
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
146 local quotes requested

We value honesty and integrity in all aspects of our business. With over 10 years of plumbing and drain cleaning experience, we pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction.

"Price was high, especially for being there for less than 10 minutes. He also came 1 hours before agreed upon time. Job was completed, so in all it was done fine."

E L on October 2025

We value honesty and integrity in all aspects of our business. With over 10 years of plumbing and drain cleaning experience, we pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction.

"Price was high, especially for being there for less than 10 minutes. He also came 1 hours before agreed upon time. Job was completed, so in all it was done fine."

E L on October 2025


Avatar for M.T. Appliance Repair

M.T. Appliance Repair

5.00(
22
)
Approved Pro

M.T. Appliance Repair

5.00(
22
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
95 local quotes requested

25 years experience, low cost, expert repair! Our mission is to be a appliance repair contractor 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. We won't leave until the job is done right! Call or click to schedule an estimate today!

"Michael was great! Same day response to my initial contact. Next day he was diagnosing the problem. He found the part and I ordered it so no upcharge on part. He came back next business day to install new part. He may not always be able to respond the next day depending on how busy he is but he will respond as quickly as possible. A very personable man, efficient, responsive and he will be my appliance repair man from this point forward."

Kelly M on September 2025

25 years experience, low cost, expert repair! Our mission is to be a appliance repair contractor 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. We won't leave until the job is done right! Call or click to schedule an estimate today!

"Michael was great! Same day response to my initial contact. Next day he was diagnosing the problem. He found the part and I ordered it so no upcharge on part. He came back next business day to install new part. He may not always be able to respond the next day depending on how busy he is but he will respond as quickly as possible. A very personable man, efficient, responsive and he will be my appliance repair man from this point forward."

Kelly M on September 2025


Avatar for Basement Gurus, LLC

Basement Gurus, LLC

4.84(
151
)
Approved Pro

Basement Gurus, LLC

4.84(
151
)
Approved Pro
Customers say: Quality work
890 local quotes requested
15 years of experience

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"I was getting water in my basement every time it rained, Dan helped me rule out other causes and recommended a french drain. Basement has been bone dry ever since. The workers took great care and even repaired the water damage from before. I highly recommend calling Basement Gurus for any basement related needs"

Andrew R on December 2025

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"I was getting water in my basement every time it rained, Dan helped me rule out other causes and recommended a french drain. Basement has been bone dry ever since. The workers took great care and even repaired the water damage from before. I highly recommend calling Basement Gurus for any basement related needs"

Andrew R on December 2025


Avatar for Renken Remodeling

Renken Remodeling

4.58(
50
)
Approved Pro

Renken Remodeling

4.58(
50
)
Approved Pro
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
202 local quotes requested

Renken Bath and Shower Remodeling is a leading bathroom remodeling company serving Maryland, Virginia, West Virginia, and Pennsylvania. Offering complete one-day bathroom remodeling and renovation services, Renken Remodeling features professional design consultants and unlimited color and accessory combinations to help you design the custom bathroom of your dreams.

"Renken did an excellent job. Highly recommend."

James G on December 2024

Renken Bath and Shower Remodeling is a leading bathroom remodeling company serving Maryland, Virginia, West Virginia, and Pennsylvania. Offering complete one-day bathroom remodeling and renovation services, Renken Remodeling features professional design consultants and unlimited color and accessory combinations to help you design the custom bathroom of your dreams.

"Renken did an excellent job. Highly recommend."

James G on December 2024

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Boiler Repair questions, answered by experts

Signs of needing a new expansion tank include visible leaks and a dull sound when you knock your knuckles against the tank (working tanks should sound hollow). A malfunctioning tank may also sweat with condensation, cause pipes to create loud noises when the system is turned off, and lead to very high-pressure readings on the boiler’s gauges. When in doubt, call for a professional inspection to find the source of the problem.

To maintain a boiler and ensure it works optimally, regularly read the temperature and pressure gauges on the unit to ensure they're within the limits described in your owner's manual. Lubricate the circulating pump according to the manufacturer's instructions. Check the water level in the expansion tank and open the tank valve to drain it if it's more than half full.

Always consult your manual for specific pressure numbers. Many expansion tanks come pre-pressurized at a specific PSI range, anywhere from 12 to 40 PSI, designed for a range of home boilers. You should not have to pressurize an expansion tank yourself, only the boiler system. If your system has a tank that needs to be manually pressurized, this is generally a job for professionals and their tools.

An expansion tank must always be installed on the supply side, which is the side where the boiler sends water out to heat the systems. That placement allows the water to push against the air and condense properly as it is heated, then circulated through the system. Professional installers can recommend the best place on the supply side for an expansion tank.

Annual servicing, checking for leaks, and maintaining proper pressure extend the system’s life.

The Harwood, MD homeowners’ guide to boiler repairs

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