Top-rated water heater repair or service pros.

Get matched with top water heater repair or service pros in Nashua, NH

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Water heater repair or service pros in Nashua

Avatar for Soulios Heating & Cooling, LLC

Soulios Heating & Cooling, LLC

4.96(
14
)
Approved Pro

Soulios Heating & Cooling, LLC

4.96(
14
)
Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
6 years of experience

Queen City HVAC LLC is committed to excellence in 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.

"Wonderful service from Adam! My water heater was struggling to keep up with my wife?s long showers - which by the way she heats them up hot as hell! ? Besides the point, Adam recommended sizing up the water heater in order to keep up with the demands of some crazy hot water. Incredibly fast installation process and Adam was really friendly. I would definitely recommend him to all my friends who are looking for a plumber. You should certainly give him a call!"

Aubrey T on April 2025

Queen City HVAC LLC is committed to excellence in 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.

"Wonderful service from Adam! My water heater was struggling to keep up with my wife?s long showers - which by the way she heats them up hot as hell! ? Besides the point, Adam recommended sizing up the water heater in order to keep up with the demands of some crazy hot water. Incredibly fast installation process and Adam was really friendly. I would definitely recommend him to all my friends who are looking for a plumber. You should certainly give him a call!"

Aubrey T on April 2025


Avatar for Skovron Mechanical Services

Skovron Mechanical Services

4.44(
76
)
Approved Pro

Skovron Mechanical Services

4.44(
76
)
Approved Pro
Customers say: Quick response
22 years of experience
Free onsite estimate

Welcome and thank you for your interest in Skovron Mechanical. Highly trained and knowledgeable in the diagnosis, repair, and installation of heating, cooling, and refrigeration equipment. You can be rest assured that you will receive quality products and dependable service whenever you need Skovron Mechanical, from recommending the right system to arranging convenient financing. Honest, Upfront Pricing - You will receive a price before any work is performed to make sure there are no surprises to you. Once you decide to do the work there are no extra charges other than what you approve. This way you know exactly what you are paying for so you don�t have to worry about any �hidden cost�.

"Work was done promptly and the boiler works great! All issues were addressed and fixed in a timely matter. So appreciative that they came out quickly and got things done."

Betty F on September 2025

Welcome and thank you for your interest in Skovron Mechanical. Highly trained and knowledgeable in the diagnosis, repair, and installation of heating, cooling, and refrigeration equipment. You can be rest assured that you will receive quality products and dependable service whenever you need Skovron Mechanical, from recommending the right system to arranging convenient financing. Honest, Upfront Pricing - You will receive a price before any work is performed to make sure there are no surprises to you. Once you decide to do the work there are no extra charges other than what you approve. This way you know exactly what you are paying for so you don�t have to worry about any �hidden cost�.

"Work was done promptly and the boiler works great! All issues were addressed and fixed in a timely matter. So appreciative that they came out quickly and got things done."

Betty F on September 2025


Avatar for Daigle Plumbing Heating and Cooling

Daigle Plumbing Heating and Cooling

4.36(
34
)
Approved Pro

Daigle Plumbing Heating and Cooling

4.36(
34
)
Approved Pro
Customers say: True professional
113 local quotes requested
44 years of experience

Daigle Plumbing, Heating & Cooling is family-owned and operated by the Daigle family. We are proud to provide quality, dependable plumbing, heating, and cooling services in Derry for our customers in the surrounding areas. Our crew is full of expert technicians who are ready to help you get your system up and running!

"Great job on replacing my 50 yo oil tank."

Ellie B on August 2025

Daigle Plumbing, Heating & Cooling is family-owned and operated by the Daigle family. We are proud to provide quality, dependable plumbing, heating, and cooling services in Derry for our customers in the surrounding areas. Our crew is full of expert technicians who are ready to help you get your system up and running!

"Great job on replacing my 50 yo oil tank."

Ellie B on August 2025


Avatar for Walley’s Heating & Air Conditioning

Walley’s Heating & Air Conditioning

4.88(
96
)
Approved Pro

Walley’s Heating & Air Conditioning

4.88(
96
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
31 local quotes requested

Walley’s is not your average HVAC contractor. From our in-house sales and support center to our modern fleet of licensed technicians, our team has the tools, trucks, and training to handle all of your mechanical needs. But more than that, we are committed to giving back and playing a bigger role in our community. Through our work with local charities, educational providers, and our continued efforts towards promoting energy-efficient products, ethical business practices, and enforcing the highest industry standards, Walley’s is delivering real value to the community every day! Our entire team is grateful for the opportunity to show you what we are made of. Thank you for your consideration.

"Badly. 2 different techs came out. We paid for a Premium service and within hours of that tech coming out, our burner stopped working completely. Mind you there is a snowstorm. They sent out a new technician and he saw nothing wrong with the system at all. He said we had no oil. He said there was no footprints even going to my intake on the side of my house. It had snowed 2 times since oil was delivered, so that makes no sense. The tech was absolutely sure we had no oil. 3 days since the first visit now and we had oil delivered and the tank filled completely. Only 150 gallons went into my 250 gallon tank. So that's wrong. And I look at the front of my furnace and now see a slow drip from the front underneath the box on the front of the furnace. First tech recommended i replace the electrodes but said it didnt need it. Second tech didnt even mention that and said our system was good. Now, I will have to contact Angi for support and my insurance company. TERRIBLE TERRIBLE TERRIBLE"

Paul C on February 2025

Walley’s is not your average HVAC contractor. From our in-house sales and support center to our modern fleet of licensed technicians, our team has the tools, trucks, and training to handle all of your mechanical needs. But more than that, we are committed to giving back and playing a bigger role in our community. Through our work with local charities, educational providers, and our continued efforts towards promoting energy-efficient products, ethical business practices, and enforcing the highest industry standards, Walley’s is delivering real value to the community every day! Our entire team is grateful for the opportunity to show you what we are made of. Thank you for your consideration.

"Badly. 2 different techs came out. We paid for a Premium service and within hours of that tech coming out, our burner stopped working completely. Mind you there is a snowstorm. They sent out a new technician and he saw nothing wrong with the system at all. He said we had no oil. He said there was no footprints even going to my intake on the side of my house. It had snowed 2 times since oil was delivered, so that makes no sense. The tech was absolutely sure we had no oil. 3 days since the first visit now and we had oil delivered and the tank filled completely. Only 150 gallons went into my 250 gallon tank. So that's wrong. And I look at the front of my furnace and now see a slow drip from the front underneath the box on the front of the furnace. First tech recommended i replace the electrodes but said it didnt need it. Second tech didnt even mention that and said our system was good. Now, I will have to contact Angi for support and my insurance company. TERRIBLE TERRIBLE TERRIBLE"

Paul C on February 2025


Avatar for Heritage Home Service

Heritage Home Service

4.18(
422
)
Approved Pro

Heritage Home Service

4.18(
422
)
Approved Pro
Customers say: Super punctual
137 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!

"All I needed was a replacement for a broken, rusted toilet flange that was set in cast iron. The technician was very professional, and the quality of the work was excellent—I could never have done it myself. I gave 4 stars instead of 5 only because of the cost ($650). To be fair, I didn’t get any other estimates, but it did seem a bit expensive for a job that took only one hour."

William C on November 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!

"All I needed was a replacement for a broken, rusted toilet flange that was set in cast iron. The technician was very professional, and the quality of the work was excellent—I could never have done it myself. I gave 4 stars instead of 5 only because of the cost ($650). To be fair, I didn’t get any other estimates, but it did seem a bit expensive for a job that took only one hour."

William C on November 2025


"Eric was very precise in his work. We had some speed bumps that occurred due to the full gut of the bathroom. He dealt with problems effectively and kept us informed as to what he needed to do and why. Eric was great to work with and the end product was perfect. We would recommend Hot & Cold Plumming!"

80 Mill St G on October 2025

SUPER SERVICE AWARD 2023, 2022, 2021, 2020, 2019,2018,2017,2016, 2015, 2014 AND 2013 PLUMBING. Hot & Cold Plumbing & Heating LLC is a full service plumbing, heating and gas-fitting company. For an immediate response to all your plumbing and heating needs, CALL (978) 701-1617.

"Eric was very precise in his work. We had some speed bumps that occurred due to the full gut of the bathroom. He dealt with problems effectively and kept us informed as to what he needed to do and why. Eric was great to work with and the end product was perfect. We would recommend Hot & Cold Plumming!"

80 Mill St G on October 2025


Avatar for DiOrio Builders & Designers Inc

DiOrio Builders & Designers Inc

4.58(
125
)
Approved Pro

DiOrio Builders & Designers Inc

4.58(
125
)
Approved Pro
Customers say: Quality work
220 local quotes requested
59 years of experience

DiOrio Builders and Designers Inc. is a fully licensed and insured company committed to providing homeowners with the highest level of craftsmanship. Built on old fashioned values we are experienced specialists that will complete your project to exact specifications in a timely manner. Quality work is our priority while paying special attention to detail. No job is too big or too small.

"They gave a good estimate of work to be completed and contract laid everything out clearly and completely. They were well organized and had great communication. They kept the job site clean each day and the work was well done."

Melissa C on October 2025

DiOrio Builders and Designers Inc. is a fully licensed and insured company committed to providing homeowners with the highest level of craftsmanship. Built on old fashioned values we are experienced specialists that will complete your project to exact specifications in a timely manner. Quality work is our priority while paying special attention to detail. No job is too big or too small.

"They gave a good estimate of work to be completed and contract laid everything out clearly and completely. They were well organized and had great communication. They kept the job site clean each day and the work was well done."

Melissa C on October 2025


Avatar for Sila Heating, Cooling, Plumbing and Electrical

Sila Heating, Cooling, Plumbing and Electrical

4.54(
5,210
)
Approved Pro

Sila Heating, Cooling, Plumbing and Electrical

4.54(
5,210
)
Approved Pro
Customers say: Super punctual
5743 local quotes requested
36 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Great, as always. Sila is outstanding. We have a service contract with them for our furnace and AC and they keep them in tip-top shape. And when we have an urgent or emergency situation (heating, cooling, plumbing, electrical), they're who we call."

Jonathan P on November 2025

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Great, as always. Sila is outstanding. We have a service contract with them for our furnace and AC and they keep them in tip-top shape. And when we have an urgent or emergency situation (heating, cooling, plumbing, electrical), they're who we call."

Jonathan P on November 2025


Avatar for Petro Home Services

Petro Home Services

4.12(
146
)

Petro Home Services

4.12(
146
)
Customers say: Super punctual
122 years of experience

We're America’s #1 local home heating oil and total home comfort services provider (heating, cooling, plumbing, & chimney). 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!

"Our heater stopped functioning on Nov 27, 2023 and we called Petro who had done the maintenance on it before and replaced a motor two years ago. They were responsive and a technician came two days later. He worked for 3 hours without explaining what the problem was. Then said he needed to replace the motor. He fixed the problem and left without much explanation. Two days later a bill of $2500 came via email. No explanation, no break-down. I called 4 times over the last 20 days, spoke to 4 different reps and was promised that a supervisor will contact me with the bill details. Nothing happened. Irresponsible customer service and unprofessional behavior. They show all the symptoms of big, bureaucratic, and indifferent service company. I would not recommend Petro if you have options of more personalized services."

Nasser R on December 2023

We're America’s #1 local home heating oil and total home comfort services provider (heating, cooling, plumbing, & chimney). 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!

"Our heater stopped functioning on Nov 27, 2023 and we called Petro who had done the maintenance on it before and replaced a motor two years ago. They were responsive and a technician came two days later. He worked for 3 hours without explaining what the problem was. Then said he needed to replace the motor. He fixed the problem and left without much explanation. Two days later a bill of $2500 came via email. No explanation, no break-down. I called 4 times over the last 20 days, spoke to 4 different reps and was promised that a supervisor will contact me with the bill details. Nothing happened. Irresponsible customer service and unprofessional behavior. They show all the symptoms of big, bureaucratic, and indifferent service company. I would not recommend Petro if you have options of more personalized services."

Nasser R on December 2023


Healey Construction & development LLC

1.00(
1
)

Healey Construction & development LLC

1.00(
1
)
38 years of experience

General Contracting

General Contracting

...
Showing 1-10 of 1000
FAQs for water heater repair or service projects in Nashua, NH

Warning signs include fluctuating water temperatures, a pilot light that repeatedly goes out, unusual noises from the tank, or complete heating failure. You might also detect a rotten egg smell, indicating a potential gas leak, or notice water that never reaches the proper temperature. If your water heater is over eight years old and displaying these symptoms, the gas valve is a likely culprit. Professional inspection is recommended, especially if gas odors are present.

Water heater gas valves are not universally interchangeable. Each valve must match your specific water heater's make, model, and specifications. Important compatibility factors include gas type (natural gas vs. propane), BTU rating, connection types, and physical dimensions. Using an incorrect valve can result in poor performance, premature failure, or dangerous gas leaks. Always consult your water heater's documentation or a professional plumber to identify the appropriate replacement valve for your unit.

The Nashua, NH homeowners’ guide to water heater repair or services

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