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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon33
    Verified boiler repairs reviews

Find Boiler repair pros in Castine

Avatar for CM Heating & Air Conditioning

CM Heating & Air Conditioning

2510 Belfast Rd
New on AngiNew on Angi
Approved Pro

CM Heating & Air Conditioning

2510 Belfast Rd
New on AngiNew on Angi
Approved Pro
15 years of experience
Free onsite estimate

Residential and commercial installations of furnaces, boilers, heat pumps, and central air conditioning. I would be happy to help you make your home more comfortable and efficient. The best way to contact me is via telephone 207-820-0404. Thanks

Residential and commercial installations of furnaces, boilers, heat pumps, and central air conditioning. I would be happy to help you make your home more comfortable and efficient. The best way to contact me is via telephone 207-820-0404. Thanks


Avatar for Sprague's Plumbing Solutions

Sprague's Plumbing Solutions

1899 Pushaw Rd
4.97(
20
)
Approved Pro

Sprague's Plumbing Solutions

1899 Pushaw Rd
4.97(
20
)
Approved Pro
Super Service Award
Customers say: Quick response
17 local quotes requested
4 years of experience

At company , 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!

"They immediately contacted me, fit me right in the next day, and fixed the issue quickly, and it looks amazing."

Patrick D on August 2025

At company , 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!

"They immediately contacted me, fit me right in the next day, and fixed the issue quickly, and it looks amazing."

Patrick D on August 2025


Avatar for Brown and Son's Construction & Masonry

Brown and Son's Construction & Masonry

19 Phillips Ln
4.18(
11
)
Approved Pro

Brown and Son's Construction & Masonry

19 Phillips Ln
4.18(
11
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

Here at Brown and Son's Construction & Masonry, we are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of quality home improvement services. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"Roger & his team were a pleasure to work with during a multi-month front porch construction project: Patient, communicative, & responsive. They remained committed to project completion while taking on two unanticipated side-efforts on our property & adjusting finishing work where requested. Their determination & professionalism transformed our home's entrance, & we would gladly recommend them for similar artistry in the future."

Andrew J on July 2025

Here at Brown and Son's Construction & Masonry, we are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of quality home improvement services. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

"Roger & his team were a pleasure to work with during a multi-month front porch construction project: Patient, communicative, & responsive. They remained committed to project completion while taking on two unanticipated side-efforts on our property & adjusting finishing work where requested. Their determination & professionalism transformed our home's entrance, & we would gladly recommend them for similar artistry in the future."

Andrew J on July 2025


Avatar for MAC Heat Pumps

MAC Heat Pumps

87 Hillside Avenue
4.93(
22
)
Approved Pro

MAC Heat Pumps

87 Hillside Avenue
4.93(
22
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
51 local quotes requested

We are a locally-owned and operated, full-service ductless mini-split heat pump company. Our goal is to provide Mainers with affordable heating and cooling solutions. Contact us and we'll do a complimentary, no-obligation evaluation of your space. If a heat pump is right for you, we will be there through every step: system design, installation, rebates, and service - with a long-term commitment to you as our customer. Unlike some companies that are only interested in the sale and nothing more, at MAC Heat Pumps we're here for the life of your heat pump.

"Was nice to hire experienced labor for once. Good experience."

Brian S on January 2024

We are a locally-owned and operated, full-service ductless mini-split heat pump company. Our goal is to provide Mainers with affordable heating and cooling solutions. Contact us and we'll do a complimentary, no-obligation evaluation of your space. If a heat pump is right for you, we will be there through every step: system design, installation, rebates, and service - with a long-term commitment to you as our customer. Unlike some companies that are only interested in the sale and nothing more, at MAC Heat Pumps we're here for the life of your heat pump.

"Was nice to hire experienced labor for once. Good experience."

Brian S on January 2024


Avatar for Chimney Guys

Chimney Guys

289 Exeter Road
4.50(
14
)
Approved Pro

Chimney Guys

289 Exeter Road
4.50(
14
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
11 local quotes requested

With years of experience serving the Bangor, ME area, Chimney Guys is your solution for all your chimney needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction is guaranteed!

"Great group to work with!"

Jason T on May 2023

With years of experience serving the Bangor, ME area, Chimney Guys is your solution for all your chimney needs. We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction is guaranteed!

"Great group to work with!"

Jason T on May 2023


Avatar for Bradford Home Services

Bradford Home Services

145 S. Main St
No reviews yet

Bradford Home Services

145 S. Main St
No reviews yet
1 years of experience

Bradford Home Services is your personal maintenance company for your home, condo, rental property, or seasonal property! Born from our sister company Bradford Construction Management, you can trust your home is being reviewed by seasoned home builders! We have over 70 years of experience in the residential construction market, building high end homes, from design to finish. Take advantage of our bi-annual assessments for only $25/Month! We will review your whole home Exterior, Interior, plumbing, electrical, heating etc! we will then send you a detailed report with pictures, videos, and recommendation on fixes! But it doesn't stop there, we can price and repair any aspect of your home!

Bradford Home Services is your personal maintenance company for your home, condo, rental property, or seasonal property! Born from our sister company Bradford Construction Management, you can trust your home is being reviewed by seasoned home builders! We have over 70 years of experience in the residential construction market, building high end homes, from design to finish. Take advantage of our bi-annual assessments for only $25/Month! We will review your whole home Exterior, Interior, plumbing, electrical, heating etc! we will then send you a detailed report with pictures, videos, and recommendation on fixes! But it doesn't stop there, we can price and repair any aspect of your home!


NB welding & piping

1717 Main St Mapelton ME
No reviews yet

NB welding & piping

1717 Main St Mapelton ME
No reviews yet

We are a certified and insured welding company that specializes in welding repair/ new fabrication project/ industrial pipe welding and plumbing. We are on site and can travel anywhere to get the job done!

We are a certified and insured welding company that specializes in welding repair/ new fabrication project/ industrial pipe welding and plumbing. We are on site and can travel anywhere to get the job done!


"Did great work, reliable and knowledgable."

Lynn L on February 2024

Handyman services, lawn care, snow removal.

"Did great work, reliable and knowledgable."

Lynn L on February 2024


The HVAC Doctor llc

No reviews yet

The HVAC Doctor llc

No reviews yet

Small Family owned business, We have a Facebook page, fully licensed and insured, 24/7 heating, plumbing, heat pumps, oil and lp units. service, installs. Waldo County/ Penobscot County Maine

Small Family owned business, We have a Facebook page, fully licensed and insured, 24/7 heating, plumbing, heat pumps, oil and lp units. service, installs. Waldo County/ Penobscot County Maine


Hernandez Electric LLC

No reviews yet

Hernandez Electric LLC

No reviews yet

Licensed and insured residential electrical with a focus on green energy systems. Hernandez Electric specializes in solar, heat pumps, and electric vehicle chargers.

Licensed and insured residential electrical with a focus on green energy systems. Hernandez Electric specializes in solar, heat pumps, and electric vehicle chargers.

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Boiler Repair questions, answered by experts

Steam boilers require flushing at least every six to 12 months to keep them operating effectively for as long as possible. Depending on your water quality and frequency of use, you might need to do this more frequently. The flushing process helps to remove problematic buildup of sediments. While a boiler contractor near you can perform a thorough annual flush, learning how to drain the system yourself means you can do this monthly if you experience speedy mineral accumulation because of hard water. 

To figure out if your boiler is worth repairing or if you need to replace your boiler, first figure out how old the unit is. Boilers last 15 to 20 years, so if your unit is 15 years old or older, it may be better to replace the entire thing depending on the severity of the problems. If it’s not quite that old, then it’s probably worth repairing. Another thing to consider is whether your warranty covers any of the repair costs. If so, it may be worthwhile to repair your boiler to keep it running.

If your boiler is 20 years old, it’s time to get a new one. Although it may seem to be working fine, it’s likely eating up more fuel than it should. Also, compared to a brand-new boiler, one that’s 20 years old is probably not working as well. When you get your new unit, you’ll notice that your home is heating more quickly, and the heat is consistent throughout all the rooms.

A home radiator works by using radiation and convection to transfer heat throughout your home. Electric radiators use metal to conduct heat and warm the air, which then rises to warm the room. Steam and hot water radiators work with a boiler and piping system to pump thermal energy throughout the home. Hot water radiators use a boiler to heat the water before circulating it to the radiator, while steam heating radiator systems convert the heated water to steam before circulating it out. When the water or steam cools, it travels back to the boiler to be heated again.

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.

The Castine, ME homeowners’ guide to boiler repairs

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