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Find Boiler repair pros in Denville

Avatar for Gold Medal Service

Gold Medal Service

4.00(
4
)
Approved Pro

Gold Medal Service

4.00(
4
)
Approved Pro
Customers say: Quick response
937 local quotes requested
Free onsite estimate

Gold Medal Service is your premier choice for Electrical and Home Systems needs! In the New York City (Tri-State Area). Our team of experts is dedicated to providing top-notch service. With our unmatched expertise and commitment to customer satisfaction. Contact us today for a gold standard service experience.

"I recently replaced the heating/air conditioning unit in my townhome. It was an easy process start to finish. Aiden (sales) answered all my questions and provided options for my needs. Mick the technician was on-time and thorough. These guys represented their company well. Great experience working with Gold Medal Service."

Isa R on January 2025

Gold Medal Service is your premier choice for Electrical and Home Systems needs! In the New York City (Tri-State Area). Our team of experts is dedicated to providing top-notch service. With our unmatched expertise and commitment to customer satisfaction. Contact us today for a gold standard service experience.

"I recently replaced the heating/air conditioning unit in my townhome. It was an easy process start to finish. Aiden (sales) answered all my questions and provided options for my needs. Mick the technician was on-time and thorough. These guys represented their company well. Great experience working with Gold Medal Service."

Isa R on January 2025


Avatar for Gold Medal Service

Gold Medal Service

3.57(
355
)
Approved Pro

Gold Medal Service

3.57(
355
)
Approved Pro
Customers say: Super punctual
82 local quotes requested
45 years of experience

Plumbing, HVAC, and electrical systems make your house livable. One minor issue with any of these systems can put your home at a standstill. In case you find yourself in this unfortunate situation, know that you can count on Gold Medal Service. For over 24 years, our company has been taking care of the homes of New Jersey residents through our top quality plumbing, HVAC, and electrical services. We are available 24 hours a day, 7 days a week to address even the most mind-boggling issues of your in-home equipment. From repairs, installations, and upgrades, our technicians are known for getting the job done right every time. We also provide upfront pricing with a full description of the service before commencing work to avoid any surprises down the line.

"I just finished having my new furnace and AC unit installed by Gold Metal. Workers were really great and did a very good job. Did a great job of leaving the area very clean and were very professional. I have used Gold Metal for years and have always been happy with their service. I would highly recomend their services."

JEFF K on August 2025

Plumbing, HVAC, and electrical systems make your house livable. One minor issue with any of these systems can put your home at a standstill. In case you find yourself in this unfortunate situation, know that you can count on Gold Medal Service. For over 24 years, our company has been taking care of the homes of New Jersey residents through our top quality plumbing, HVAC, and electrical services. We are available 24 hours a day, 7 days a week to address even the most mind-boggling issues of your in-home equipment. From repairs, installations, and upgrades, our technicians are known for getting the job done right every time. We also provide upfront pricing with a full description of the service before commencing work to avoid any surprises down the line.

"I just finished having my new furnace and AC unit installed by Gold Metal. Workers were really great and did a very good job. Did a great job of leaving the area very clean and were very professional. I have used Gold Metal for years and have always been happy with their service. I would highly recomend their services."

JEFF K on August 2025


Avatar for Petro Home Services

Petro Home Services

4.44(
98
)
Approved Pro

Petro Home Services

4.44(
98
)
Approved Pro
Customers say: True professional
580 local quotes requested
122 years of experience

With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!

"Worst service I’ve ever have experienced. They wanted to sell me the product, never told me that there was an early termination fee and another penalty for an initial offer they gave me. Had double charges every month, once for the oil they provided (which they never told me they were going to provide before coming. They just came without my knowledge and then I find a high amount bill) and another for an “automatic payment” for 500 that they never could explain. The didn’t even fix this issue and it kept happening every month even after I cancelled the service. Then having to call them is a hastié for the refund of the 500. Stay away of this company"

Axel R on January 2023

With over 100 years experience, we know how to keep you comfortable, safe and help you save on energy costs. Our local 24/7 customer service and support means automatic heating oil deliveries and our service response is always fast. We never run out of heating oil plus our pricing and payment plans are designed to help you manage your costs all year round. Experience the Petro difference today!

"Worst service I’ve ever have experienced. They wanted to sell me the product, never told me that there was an early termination fee and another penalty for an initial offer they gave me. Had double charges every month, once for the oil they provided (which they never told me they were going to provide before coming. They just came without my knowledge and then I find a high amount bill) and another for an “automatic payment” for 500 that they never could explain. The didn’t even fix this issue and it kept happening every month even after I cancelled the service. Then having to call them is a hastié for the refund of the 500. Stay away of this company"

Axel R on January 2023


Avatar for AJT Complete Construction LLC

AJT Complete Construction LLC

4.89(
306
)
Approved Pro

AJT Complete Construction LLC

4.89(
306
)
Approved Pro
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
92 local quotes requested

At AJT Complete Construction, we take great pride in our experience, expertise, quality, and customer service. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. We offer free estimates and evaluations

"A++ experience. Extremely professional and efficient and did an amazing job cleaning up. I would recommend AJT Complete Construction LLC to anyone."

Randon L on November 2025

At AJT Complete Construction, we take great pride in our experience, expertise, quality, and customer service. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. We offer free estimates and evaluations

"A++ experience. Extremely professional and efficient and did an amazing job cleaning up. I would recommend AJT Complete Construction LLC to anyone."

Randon L on November 2025


Avatar for Dawson Mechanical Contracting

Dawson Mechanical Contracting

4.84(
121
)
Approved Pro

Dawson Mechanical Contracting

4.84(
121
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
324 local quotes requested

We are a BPI Building Performance Institute Accredted Plumbing and HVAC company, We are licensed plumbers and I am a certified plumbing instructor and fire inspector I also have 2 Backflow testing certifiactions. We do the highest quality residential and commercial work with my highly trained staff. I am the past president of the N.J. State league of Master plumbers for 2010-2011

"Want to give great praise to David Weinfeldt and staff. I experienced home boiler and pipe issues. Compared to other's Dave gave a excellent and fair price quote. I had other quotes, but Dave stood behind his. I accepted his offer. Omar and William arrived on time. They looked at the task and gave a great resolution. Replacing pipes and boiler work is never easy, especially when working behind walls etc. Omar and William did a neat and professional job. When completed they showed me what was done and offered great maintenance advice. Dawson Mechanical is the way to go. "

Kevin B on November 2025

We are a BPI Building Performance Institute Accredted Plumbing and HVAC company, We are licensed plumbers and I am a certified plumbing instructor and fire inspector I also have 2 Backflow testing certifiactions. We do the highest quality residential and commercial work with my highly trained staff. I am the past president of the N.J. State league of Master plumbers for 2010-2011

"Want to give great praise to David Weinfeldt and staff. I experienced home boiler and pipe issues. Compared to other's Dave gave a excellent and fair price quote. I had other quotes, but Dave stood behind his. I accepted his offer. Omar and William arrived on time. They looked at the task and gave a great resolution. Replacing pipes and boiler work is never easy, especially when working behind walls etc. Omar and William did a neat and professional job. When completed they showed me what was done and offered great maintenance advice. Dawson Mechanical is the way to go. "

Kevin B on November 2025


Farina Plumbing

4.69(
146
)
Approved Pro

Farina Plumbing

4.69(
146
)
Approved Pro
Customers say: True professional
45 local quotes requested
34 years of experience

Farina Plumbing is a licensed master plumber in the state of New Jersey; I am a licensed professional plumbing inspector and hold specialty licenses as an ICS (industrial commercial specialist). HHS (high-rise hazard specialist), and being a sub-code official. I am fully affiliated with the state of New Jersey plumbing codes. We charge a service fee to arrive for serious inquires of 75 dollars. The 75 dollar fee will be waived if job is complete. We have been a reliable plumber for 38 years and have been doing plumbing inspections for over 25 years. We offer the utmost customer service and can guarantee you will be satisfied with our service. Give us a call today! 2013969351

"What a great experience- often you don’t know what you’ll get. This is not about contractor nightmares but a dream outcome. My two sinks ( kitchen and bar) had faucets replaced. Everything was done to perfection. And because the garbage disposal was not in in time Ken offered to return- now THAT is customer service. "

Vanessa T on November 2025

Farina Plumbing is a licensed master plumber in the state of New Jersey; I am a licensed professional plumbing inspector and hold specialty licenses as an ICS (industrial commercial specialist). HHS (high-rise hazard specialist), and being a sub-code official. I am fully affiliated with the state of New Jersey plumbing codes. We charge a service fee to arrive for serious inquires of 75 dollars. The 75 dollar fee will be waived if job is complete. We have been a reliable plumber for 38 years and have been doing plumbing inspections for over 25 years. We offer the utmost customer service and can guarantee you will be satisfied with our service. Give us a call today! 2013969351

"What a great experience- often you don’t know what you’ll get. This is not about contractor nightmares but a dream outcome. My two sinks ( kitchen and bar) had faucets replaced. Everything was done to perfection. And because the garbage disposal was not in in time Ken offered to return- now THAT is customer service. "

Vanessa T on November 2025


Avatar for Olympic Mechanical

Olympic Mechanical

4.99(
114
)
Approved Pro

Olympic Mechanical

4.99(
114
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
8 years of experience

Olympic Mechanical proudly serves it's customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!

"George handled the job very well He did a great job and did a follow-up to make sure we were happy I WOULD HIRE HIM AGAINFOR FUTURE JOBS"

David M on August 2025

Olympic Mechanical proudly serves it's customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today!

"George handled the job very well He did a great job and did a follow-up to make sure we were happy I WOULD HIRE HIM AGAINFOR FUTURE JOBS"

David M on August 2025


Avatar for MDL Electric, LLC

MDL Electric, LLC

4.81(
67
)
Approved Pro

MDL Electric, LLC

4.81(
67
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
10 years of experience

is committed to excellence 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

"They did a good job replacing the 220v outlet to 120v. Good pricing too."

Maria R on May 2024

is committed to excellence 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

"They did a good job replacing the 220v outlet to 120v. Good pricing too."

Maria R on May 2024


Manny Design

New on AngiNew on Angi
Approved Pro

Manny Design

New on AngiNew on Angi
Approved Pro
11 years of experience
Free onsite estimate

Manny Design is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 5 years of experience serving Newark, NJ and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

Manny Design is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 5 years of experience serving Newark, NJ and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!


Avatar for A&C Quality Air, LLC

A&C Quality Air, LLC

4.86(
134
)
Approved Pro

A&C Quality Air, LLC

4.86(
134
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
36 local quotes requested

A&C Quality Air, LLC, is your local cooling, and heating professional. We help keep your home comfortable. Contact us for a free estimate. We look forward to earning your business. We are fast, friendly, and dependable. call us directly- 201-988-8313

"A&C Quality Air did an excellent job replacing my boiler and installing central air. The team was professional, efficient, and respectful. Great experience from start to finish — highly recommend!"

Harry N on July 2025

A&C Quality Air, LLC, is your local cooling, and heating professional. We help keep your home comfortable. Contact us for a free estimate. We look forward to earning your business. We are fast, friendly, and dependable. call us directly- 201-988-8313

"A&C Quality Air did an excellent job replacing my boiler and installing central air. The team was professional, efficient, and respectful. Great experience from start to finish — highly recommend!"

Harry N on July 2025

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Boiler Repair questions, answered by experts

Safety concerns with propane boilers include proper venting to prevent carbon monoxide buildup, secure gas line connections, and regular inspection of safety controls. Professional boiler installation and annual maintenance are essential to minimize risks. Having a carbon monoxide detector installed in your home is essential for early detection of any leaks or ventilation issues.

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.

Over time, a radiator can leak if turned off due to the built-up air pressure, which can cause water or coolant to leak. If your radiator leaks when it’s off, turn your whole system off and bleed the radiator, then turn it back on. If it’s still leaking, you might want to have an HVAC professional look at the issue.

If you have a closed-system boiler that needs an expansion tank to work, you cannot run your boiler without it (not without the risk of extensive damage and even explosions). Your options include moving the boiler to another spot, rerouting boiler piping to a more open area, or completing a remodel around the boiler to create more space for the tank.

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. 

The Denville, NJ homeowners’ guide to boiler repairs

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