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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon2.5k+
    Verified boiler repairs reviews

Find Boiler repair pros in Frederick

Avatar for BlueStar Air Mechanical Inc.
BlueStar Air Mechanical Inc.
4.9(
32
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Frederick, MD and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Very satisfied with responsiveness, punctuality and professionalism! Danny was able to squeeze us into Blue Star's full schedule at a time that worked for us and called before the visit for clarification about the problem, and after the visit about how things went. John called before arrival to let us know about exact timing, and was very thorough in investigating the problem and then explaining the situation. After consultation, he was able to repair our system. John also discussed what to look out for in case there are problems in the future. We have had our AC unit serviced regularly by other companies, but we will never use those other companies again. Blue Star is superior in every way! Cannot recommend highly enough. Thank you, Danny and John!!"
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+13

Response time3 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Holtzople Heating, Air Conditioning, & Electrical Services
Holtzople Heating, Air Conditioning, & Electrical Services
4.9(
214
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service - For Business+12 more

Serving Frederick, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"Just had an emergency visit to replace capacitor in one of my two HVAC units. Was able to schedule my favorite tech Kevin through the excellent front desk staff. Called in early morning and same day repair work - and Kevin fixed the problem even though the house electricity suddenly cut off halfway through the visit due to the remnants of Hurricane Debby coming through. Our family been with Holtzople since 2008 with the installation and maintenance of two TRANE heat pump units. We have always been extremely happy with Holtzople. Their expertise and knowledge of HVAC operations is superb. But most importantly, from the HVAC techs and Kevin to the front office staff, the people at Holtzople are kind, helpful and genuinely interested in taking care of us. This shows in our semiannual service plan visits as well as the rare emergency needs that pop up like the situation discussed above. And we have been very happy with our TRANE HVAC units. We will have Holtzople as our HVAC company forever. We highly recommend them to all our local friends and neighbors in central Maryland. Simply a great company with great people. 👍"
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+47

Response time1 day
Response rate100%
46 neighbors recently requested a quote
Avatar for Tim Kyle Electric Heating & Cooling
Tim Kyle Electric Heating & Cooling
4.9(
370
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Frederick, MD and surrounding areas

Approved

Super Service Award Winner

In business since 1986

Emergency services offered

Warranties offered

"I can’t say enough excellent things about Lance, the service technician who came out! We just purchased our first home so imagine our surprise when barely a month in the large grand chandelier fell from the ceiling in the early morning. I was going to replace it myself but remembered our home inspection pointed out some instances of aluminum wiring in the house so I thought I should have an electrician confirm the outlet was properly done before I go mucking around in the ceiling. Although it cost me an emergency dispatch fee, they had someone in my house first thing the very next morning. Lance was prompt and just so amazing - very kind and careful with keeping our house clean, taking care of the floors and finishings and really went above and beyond to help a very frazzled young family try figure out the mess they just purchased. While he was at our house we opted to have him also see if he could remove two outlets in the dining room from a dimmer switch so they can be always on. He explained the pricing up front and I knew what the job would cost as a final number before he began any work. For the first job, I was very impressed with how thorough and complete he was in taking care of not just the replacement chandelier, but even with safely disposing of the now broken old chandelier for us! He even offered to help move some boxes for the Salvation Army pick-up we had scheduled - I was just blown away by how kind and helpful he was! For the second job, I was so very pleased that he took the time to really figure out what was wrong. He ended up spending almost three hours discovering several issues - including things like faulty attempts at mitigating aluminum wire connection points in several outlets that we received confirmation prior to settling on the home had been fixed. He was able to come up with creative solutions to safely leverage what was already available to solve our problem and the best part is he really took the time to not only do it right, but to explain everything as he went and really helped me learn more about my house and how I can discover and resolve similar problems in the future. Being someone who is always trying to learn I really appreciated his willingness to answer my questions and share his depth of knowledge and experience! In the end, even though the job was a lot longer than either of us thought it would be, and even though the original cause for the emergency dispatch was already resolved, Lance made sure he stayed until we had a solution in place and we still only paid the initial quoted price! Yes, the price did seem a bit high compared to what I’ve seen on other provider’s quoted rates. However, the work really is just that good - absolutely worth it AND charging by the job instead of the hour takes all of the guessing out of how much you will need to pay, not to mention covers situations like this where the job ended up taking quite a bit longer than originally anticipated. We couldn’t be happier. We were so pleased with the service that we also signed up for their annual service plan to avoid emergency dispatch fees in the future and to get their annual safety inspection. There’s a lot of uncertainty associated with buying our first home, but at least we now know who we will call for all of our electrical needs!"
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+17

Response time1 day
Response rate100%
15 neighbors recently requested a quote
Avatar for Simply Home Service, LLC
Simply Home Service, LLC
5.0(
30
)
Gas Boiler or Radiator Heating System - Repair

Serving Frederick, MD and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Sean was very prompt in responding to me request for service and did his absolute best to accommodate my schedule at my convenience. He was very flexible overall and helped get my AC repair ASAP after it was broken. This was especially helpful since it was getting warm outside! He was on time for all of our appointments and communicated what needed to be done/fixed clearly, so I wasn’t left with a huge bill that I wasn’t expecting. Expectations are very important and he seems to understand. I would highly recommend Sean and/or his team for any issues you might have for a cost effective and friendly solution. Thank you so much for your help Sean!"
Response time3 hrs
Response rate97%
Recommended by93%of homeowners
Avatar for MSR Heating and Cooling, LLC
MSR Heating and Cooling, LLC
4.8(
33
)
Gas Boiler or Radiator Heating System - Repair

Serving Frederick, MD and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"I reached out to Angi’s to find a HVAC company to help with my AC that was blowing hot air in the summer. I got super lucky when I found MSR Heating and Cooling. They arrived on time and assessed my situation. I appreciated the time they took to explain the issue in ways I understood as well as recommend the best option for me. The estimate quote was fair and there were no surprise expenses to repair my unit. I can’t thank the owner, Moises enough for a job well done. His professionalism, knowledge and skills are reflected in the quality of work performed. I would highly recommend this company for your next repair."
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+8

Response time4 hrs
Response rate99%
1 neighbors recently requested a quote
Avatar for Buric Heating and Air Conditioning
Buric Heating and Air Conditioning
4.7(
20
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+7 more

Serving Frederick, MD and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"We initially called Davis and Davis when our A/C started blowing hot air. They came out three separate times, charged us money for repairs that didn't work, then decided we needed a full replacement for $4,500. We called Buric for a second opinion. Tom arrived on time, took 20 minutes to (correctly) find the problem, told us we didn't need a replacement, and repaired it for just over $400. It works great to this day. He pretty much restored our belief that honest technicians still exist in the world and saved us like $4,000. Only had one experience with them, but will always recommend them."
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+7

Response time8 hrs
6 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Carroll Mechanical, Inc.
Carroll Mechanical, Inc.
4.7(
25
)
Gas Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install

Serving Frederick, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"I recently had a HVAC and water heater installation by Carroll Mechanical, Cris Lopez and his team. They were very respectful of my home and professional throughout the install. I am grateful and appreciative of working with the owner on deciding the HVAC unit to be installed. I found him to be the consummate professional, a person of integrity, transparent, responsive to my questions and willing to work with me to gain my business. I highly recommend Carroll Mechanical."
Ins
Ins
Response time10 hrs
278 neighbors recently requested a quote
Recommended by14%of homeowners
Avatar for TriState Home Services
TriState Home Services
4.6(
204
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Frederick, MD and surrounding areas

In business since 1949

Free estimates

Emergency services offered

"Awesome! Someone answered right away when I called and told me a technician could be here in 30 minutes. It was actually only 20 minutes when Dan arrived and he was extremely professional and pleasant. He diagnosed the problem on our two systems, explained everything thoroughly with a reasonable repair estimate, then completed the work. He was here for about an hour and now the house is nice and cool, while it’s 95 degrees outside!"
Furnace Tune Up
Floor Heating System
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+2

Response time1 day
Recommended by91%of homeowners
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Boiler Repair questions, answered by experts

Yes, it is generally safe and effective to turn off radiators in unused rooms to save money on heating costs. This practice is especially beneficial with older heating systems. However, you should avoid cranking up the thermostats on the remaining radiators to compensate, as this can lead to higher heating bills and increased wear and tear on your system. While some HVAC specialists argue that modern, efficient boilers are designed to heat the entire home and work best when all radiators are on, turning off radiators in unused spaces still reduces the total amount of hot water your system needs to produce.

In most cases, repairing a radiator is more affordable than replacing it. A typical repair may cost between $100 and $200, while a replacement can average $1,500, with a range of $250 to $2,500 depending on the unit type. Radiator issues are often simple fixes for a professional, such as a blown fuse, malfunctioning thermostat, or a loose valve, and can take less than an hour. However, if the long-term costs of fixing the radiator are higher than replacement, it's better to get a new model. It is recommended to consult a heating expert to diagnose the problem and determine the best solution for your situation.

Most propane boilers last 15 to 20 years with regular maintenance and proper care. The lifespan depends on the quality of the unit, proper installation, and the level of maintenance. Investing in annual service can maximize longevity and efficiency. Routine inspections and timely repairs prevent early breakdown, ensuring your boiler heats your home for years to come.

If your radiator turns on every time you turn on your hot water, your problem is likely your motorized three-port valve that’s attached to your boiler. When it malfunctions, the valve isn’t closing properly, so the water begins to flow to your radiator, thus kicking off the heat. To fix this, hire a boiler repair tech near you to replace your valve.

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.

The Frederick, MD homeowners’ guide to boiler repairs

From average costs to expert advice, get all the answers you need to get your job done.