Top-rated boiler repair pros.

Get matched with top boiler repair pros in Alton, NH

Enter your ZIP and get matched with up to 5 pros

TRUSTED BY ALTON, NH HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon625
    Verified boiler repairs reviews

Find Boiler repair pros in Alton

Avatar for Pasquaney Mech LLC

Pasquaney Mech LLC

5.00(
7
)
Approved Pro

Pasquaney Mech LLC

5.00(
7
)
Approved Pro
28 local quotes requested
1 years of experience

Leveraging Ten Years Experience In HVAC Across The Eastern Seaboard. To Provide An Above Average Service To My Customers. Looking Forward To Helping With Your Heating and Air Conditioning Needs Fully Insured NH Gas License GF2011042 Please reach out to Tylor at 6032446331 or [email protected] After Hours and Emergency Services

"Yvette personable and knowledgeable. And honest. I had a great experience and would hire him again. I highly recommend him!"

Lisa O on August 2025

Leveraging Ten Years Experience In HVAC Across The Eastern Seaboard. To Provide An Above Average Service To My Customers. Looking Forward To Helping With Your Heating and Air Conditioning Needs Fully Insured NH Gas License GF2011042 Please reach out to Tylor at 6032446331 or [email protected] After Hours and Emergency Services

"Yvette personable and knowledgeable. And honest. I had a great experience and would hire him again. I highly recommend him!"

Lisa O on August 2025


"Great job, furnace has been running strong with no issue, and he is a great guy to work with."

Donald D on March 2025

I pride myself on my professionalism, as well as my ability to complete every job to the homeowner's total satisfaction. I never leave a job unfinished, or a homeowner not 100% satisfied with my level of service - Call today!

"Great job, furnace has been running strong with no issue, and he is a great guy to work with."

Donald D on March 2025


Avatar for Bob Daniels Electric

Bob Daniels Electric

4.88(
41
)
Approved Pro

Bob Daniels Electric

4.88(
41
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
25 years of experience

Bob Daniels Electric is a company that you can really count on. With 19 Years of experience we bring the attitude and knowledge to get the job done with the highest level of quality. Call us today for an appointment and let us help you with all of your electrical needs.

"they were great"

Charles F on January 2025

Bob Daniels Electric is a company that you can really count on. With 19 Years of experience we bring the attitude and knowledge to get the job done with the highest level of quality. Call us today for an appointment and let us help you with all of your electrical needs.

"they were great"

Charles F on January 2025


Avatar for VT Concrete Cutting & Concrete Solutions

VT Concrete Cutting & Concrete Solutions

4.54(
24
)
Approved Pro

VT Concrete Cutting & Concrete Solutions

4.54(
24
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
36 local quotes requested

We pride our company on reliability, integrity and quality work. We are experts in our trade. We look forward to earning your business! VT Concrete Cutting & Concrete Solutions has been servicing all of VT, NH and Eastern NY for over 25 years with any concrete needs. Our capabilities include coring up to 48” in diameter, cutting to any depth with our wire saw, concrete crack repair and injections, basement waterproofing, sump pump installations, basement and egress window installations, bulkhead door replacements, crawlspace repair, moisture control, concrete replacement up to 500sq feet, foundation repair and so much more. Call us today for a free estimate.

"They did excellent work and the problem has been resolved"

Scott F on April 2025

We pride our company on reliability, integrity and quality work. We are experts in our trade. We look forward to earning your business! VT Concrete Cutting & Concrete Solutions has been servicing all of VT, NH and Eastern NY for over 25 years with any concrete needs. Our capabilities include coring up to 48” in diameter, cutting to any depth with our wire saw, concrete crack repair and injections, basement waterproofing, sump pump installations, basement and egress window installations, bulkhead door replacements, crawlspace repair, moisture control, concrete replacement up to 500sq feet, foundation repair and so much more. Call us today for a free estimate.

"They did excellent work and the problem has been resolved"

Scott F on April 2025


Avatar for Heritage Home Service

Heritage Home Service

4.04(
454
)
Approved Pro

Heritage Home Service

4.04(
454
)
Approved Pro
Customers say: Super punctual
219 local quotes requested
39 years of experience

We’re Your Local Plumbers, Heating and AC Technicians, and Electricians. Get prompt and professional plumbing, heating, air conditioning, and electrical services. Our quality staff of licensed and local plumbers and electricians have been providing local plumbing, heating, air conditioning, and electric services in the New Hampshire area since our beginnings in 1986. At our heart, Heritage is a family company with a longstanding reputation for providing quality service for a fair price. People tell us that they see our service trucks everywhere in the area, which is true since there’s a good chance that one of our technicians is also your neighbor. This makes it easy for us to be at your home promptly to help you solve your household plumbing, heating, AC, and electrical problems. It also makes it easy for us to do all that we can to maintain our reputation for quality service. One way we continue to improve the quality of our work is through regular training and certification for our great attendants who are behind the scenes making the magic happen. So whether you are struggling with a clogged drain or a noisy furnace, or you need an installation of an appliance, you’ll see the results of our devotion in the service you receive. If you’re experiencing a problem with your plumbing, heating, AC, or electricity at home, then you should give us a call and see what we mean by quality service that’s guaranteed. From clogged drains to AC installation to electrician’s work, we offer a variety of quality services and products at fair prices to NH residents and northern MA residents—guaranteed!

"Excellent experience, technician arrived on time. Friendly, efficient, kept me up to date on the plan. Leak was diagnosed and toilet replaced in no time!"

Elizabeth S on July 2025

We’re Your Local Plumbers, Heating and AC Technicians, and Electricians. Get prompt and professional plumbing, heating, air conditioning, and electrical services. Our quality staff of licensed and local plumbers and electricians have been providing local plumbing, heating, air conditioning, and electric services in the New Hampshire area since our beginnings in 1986. At our heart, Heritage is a family company with a longstanding reputation for providing quality service for a fair price. People tell us that they see our service trucks everywhere in the area, which is true since there’s a good chance that one of our technicians is also your neighbor. This makes it easy for us to be at your home promptly to help you solve your household plumbing, heating, AC, and electrical problems. It also makes it easy for us to do all that we can to maintain our reputation for quality service. One way we continue to improve the quality of our work is through regular training and certification for our great attendants who are behind the scenes making the magic happen. So whether you are struggling with a clogged drain or a noisy furnace, or you need an installation of an appliance, you’ll see the results of our devotion in the service you receive. If you’re experiencing a problem with your plumbing, heating, AC, or electricity at home, then you should give us a call and see what we mean by quality service that’s guaranteed. From clogged drains to AC installation to electrician’s work, we offer a variety of quality services and products at fair prices to NH residents and northern MA residents—guaranteed!

"Excellent experience, technician arrived on time. Friendly, efficient, kept me up to date on the plan. Leak was diagnosed and toilet replaced in no time!"

Elizabeth S on July 2025


Avatar for LaPlante Electric, Inc.

LaPlante Electric, Inc.

4.75(
63
)
Approved Pro

LaPlante Electric, Inc.

4.75(
63
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
27 local quotes requested

LaPlante Electric, Inc., Please check out all the Wonderful Reviews written by our Wonderful Clients!!! Love our Clients!!! LaPlante Electric is proud to be a locally owned and family operated business that serves the Maine/New Hampshire communities. Since 1991 we have provided our customers with the highest quality products and expertise at a fair price. Since opening our doors we have built our business on being timely, tidy and making sure that every customer is 100% satisfied when the job is done. We provide our customers with on site assessments and quotes, provide financing and payment options and offer flexible installation scheduling. Our customers know that they can call 24/7 and the phone will be answered by a live person, that they will get a firm price, not an estimate and that we will show up on time when scheduled. Let us show you why our customers become customers for life, get in touch today!

"Very good They were quick efficient and kept me updated"

Janice C on November 2023

LaPlante Electric, Inc., Please check out all the Wonderful Reviews written by our Wonderful Clients!!! Love our Clients!!! LaPlante Electric is proud to be a locally owned and family operated business that serves the Maine/New Hampshire communities. Since 1991 we have provided our customers with the highest quality products and expertise at a fair price. Since opening our doors we have built our business on being timely, tidy and making sure that every customer is 100% satisfied when the job is done. We provide our customers with on site assessments and quotes, provide financing and payment options and offer flexible installation scheduling. Our customers know that they can call 24/7 and the phone will be answered by a live person, that they will get a firm price, not an estimate and that we will show up on time when scheduled. Let us show you why our customers become customers for life, get in touch today!

"Very good They were quick efficient and kept me updated"

Janice C on November 2023


Avatar for PIC Home Pros, LLC

PIC Home Pros, LLC

4.21(
202
)
Approved Pro

PIC Home Pros, LLC

4.21(
202
)
Approved Pro
Customers say: True professional
1088 local quotes requested
27 years of experience

Committed to Professionalism. This phrase encapsulates the core philosophy of our company, PIC Home Pros. Founded on principles of compassion and dedication, we strive to deliver top-notch workmanship and ensure a positive customer experience. At PIC, we offer dependable home services driven by a relentless pursuit of customer satisfaction. Our goal is to not only meet but exceed our customers' expectations, leaving them delighted with the results and eager to return to us for future projects. We take pride in providing quality products and affordable bathroom remodeling services to our valued clients. With a team boasting over 50 years of combined experience, we bring a wealth of knowledge and expertise to every project we undertake. Trust PIC to deliver excellence in every aspect of your home improvement needs.

"I signed a contract on the first week of June to have PIC Home ?Pros? remodel 3 bathrooms. They stayed for a week in the middle of September, and stopped coming, leaving a vanity in one bathroom, and a shower door in another bathroom completely uninstalled. On the last day here, I was told shower door still has not been manufactured yet, but would take a couple of weeks. They told me that it would cost $150 to have them come back to finish installation, even though contract was for them to complete the work. They ignored my emails to them, so after waiting for 3 weeks and receiving response to my email, I called them, and was told that the shower door is not ready, and even though it?s been 4 months since it was supposed to be ordered, there is still no ETA. I asked that they come back to install the vanity, since we still have no sink in one bathroom. I was told that would cost another $650 to come back and install it. They will work until they are paid in full, then abandon you. "

Mark G on October 2025

Committed to Professionalism. This phrase encapsulates the core philosophy of our company, PIC Home Pros. Founded on principles of compassion and dedication, we strive to deliver top-notch workmanship and ensure a positive customer experience. At PIC, we offer dependable home services driven by a relentless pursuit of customer satisfaction. Our goal is to not only meet but exceed our customers' expectations, leaving them delighted with the results and eager to return to us for future projects. We take pride in providing quality products and affordable bathroom remodeling services to our valued clients. With a team boasting over 50 years of combined experience, we bring a wealth of knowledge and expertise to every project we undertake. Trust PIC to deliver excellence in every aspect of your home improvement needs.

"I signed a contract on the first week of June to have PIC Home ?Pros? remodel 3 bathrooms. They stayed for a week in the middle of September, and stopped coming, leaving a vanity in one bathroom, and a shower door in another bathroom completely uninstalled. On the last day here, I was told shower door still has not been manufactured yet, but would take a couple of weeks. They told me that it would cost $150 to have them come back to finish installation, even though contract was for them to complete the work. They ignored my emails to them, so after waiting for 3 weeks and receiving response to my email, I called them, and was told that the shower door is not ready, and even though it?s been 4 months since it was supposed to be ordered, there is still no ETA. I asked that they come back to install the vanity, since we still have no sink in one bathroom. I was told that would cost another $650 to come back and install it. They will work until they are paid in full, then abandon you. "

Mark G on October 2025


Avatar for Anything & Everything Home Improvement LLC

Anything & Everything Home Improvement LLC

4.83(
59
)
Approved Pro

Anything & Everything Home Improvement LLC

4.83(
59
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
37 local quotes requested

Anything & Everything Home Improvement's Mission is to provide customer's great service in every Home Improvement they are looking to have done. We are your Home Improvement specialists! One call to complete every home project! From a small remodel service to building you your dream home! We offer free estimates!

"Jesse and his veteran crew of subs built a large log home for us. These are tricky homes to build. Any unexpected events were handled professionally. We plan to hire him again to renovate the unfinished basement."

Jennifer G on May 2022

Anything & Everything Home Improvement's Mission is to provide customer's great service in every Home Improvement they are looking to have done. We are your Home Improvement specialists! One call to complete every home project! From a small remodel service to building you your dream home! We offer free estimates!

"Jesse and his veteran crew of subs built a large log home for us. These are tricky homes to build. Any unexpected events were handled professionally. We plan to hire him again to renovate the unfinished basement."

Jennifer G on May 2022


Avatar for 603 MECHANICAL

603 MECHANICAL

5.00(
3
)
Approved Pro

603 MECHANICAL

5.00(
3
)
Approved Pro
Customers say: Quick response
47 local quotes requested
3 years of experience

With more than 15 yrs of experience, 603 Refrigeration LLC is dedicated to providing our customers with the best quality at a great price. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"The gentlemaen that have come to my house from this company have been spectacular. They came on time they’re efficient. There’s no nonsense. They found a problem replaced it and said please call back if there’s a problem and they couldn’t have been nicer. I would highly highly recommend them to anyone "

James S on August 2025

With more than 15 yrs of experience, 603 Refrigeration LLC is dedicated to providing our customers with the best quality at a great price. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"The gentlemaen that have come to my house from this company have been spectacular. They came on time they’re efficient. There’s no nonsense. They found a problem replaced it and said please call back if there’s a problem and they couldn’t have been nicer. I would highly highly recommend them to anyone "

James S on August 2025


Avatar for Bayside Property Support, LLC

Bayside Property Support, LLC

5.00(
3
)
Approved Pro

Bayside Property Support, LLC

5.00(
3
)
Approved Pro
Customers say: Quick response
15 years of experience
Free onsite estimate

Bayside Property Support is dedicated to your vacation, investment or primary property. We offer full-service support that meets the needs of homeowners in the Lakes Region of New Hampshire> Are you selling your home and need items taken care of so your property sells for the maximum price? Bayside Property Support can help! Using your second home on the lake and need maintenance or repairs? We can help! Do you live in your home year round and just need someone to change the out of reach light bulb, or do some painting? We can help! Do you need your cottage winterized, do you need someone to oversee a construction project? Bayside Property Support can handle any issue that comes up and will treat your home with respect as if it was our own! Bayside Property Support keeps you informed and up to date on our progress at your home. We are available for emergency calls and an online service request makes it easy to order the help you need or get a free estimate!

"Rob Wichland is a great leader at Bayside. I rely on him for various services each year, and he always comes through with excellent results. He is also a consistently terrific communicator on project details when necessary. Customer Service is always top notch. Robâ s staff are very professional and adept at completing many different property management services. Iâ m a very satisfied customer who has used Baysideâ s services over the past many years, and I strongly recommend them for their consistent quality work, range of services offered, easy process, timeliness, and reasonable pricing!"

Lorrie L on November 2024

Bayside Property Support is dedicated to your vacation, investment or primary property. We offer full-service support that meets the needs of homeowners in the Lakes Region of New Hampshire> Are you selling your home and need items taken care of so your property sells for the maximum price? Bayside Property Support can help! Using your second home on the lake and need maintenance or repairs? We can help! Do you live in your home year round and just need someone to change the out of reach light bulb, or do some painting? We can help! Do you need your cottage winterized, do you need someone to oversee a construction project? Bayside Property Support can handle any issue that comes up and will treat your home with respect as if it was our own! Bayside Property Support keeps you informed and up to date on our progress at your home. We are available for emergency calls and an online service request makes it easy to order the help you need or get a free estimate!

"Rob Wichland is a great leader at Bayside. I rely on him for various services each year, and he always comes through with excellent results. He is also a consistently terrific communicator on project details when necessary. Customer Service is always top notch. Robâ s staff are very professional and adept at completing many different property management services. Iâ m a very satisfied customer who has used Baysideâ s services over the past many years, and I strongly recommend them for their consistent quality work, range of services offered, easy process, timeliness, and reasonable pricing!"

Lorrie L on November 2024

...
Showing 1-10 of 175
Boiler Repair questions, answered by experts

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

Since your boiler keeps you warm and provides hot water to your home, you’re likely to notice issues with heating in your living space right away. The most obvious sign that your boiler is breaking is not getting any heat or hot water. You might also hear some odd sounds coming from your boiler during operation, the flame in your gas boiler is not blue, the pressure is inconsistent, or your boiler is using more energy than it should. If you notice any of these signs, be sure to call a pro right away.

Addressing banging, clanging, and hissing radiators involves several steps. Start by bleeding the radiator to release trapped air, a common source of noise. Next, ensure all valves, brackets, and pipes are securely tightened to prevent the components from rattling. You can also consider installing radiator insulation to dampen heat expansion sounds. If you perform all of these fixes and the noise persists, explore the use of radiator additives that can mitigate water-related noises. If all else fails, you should consult an HVAC professional.

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.

In most cases, you should hire a professional to carry out services on your HVAC system, as the components are complicated, expensive, and potentially dangerous to work with. However, there are a few things you can do on your own to keep your HVAC system in good condition, including changing your filters every three months, keeping the area around your outdoor condenser clear of debris and plant growth, making sure your or intakes aren’t blocked, and keeping an eye out for increased energy bills, strange noises, and unusual odors related to your equipment.

The Alton, NH homeowners’ guide to boiler repairs

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