Top-rated water heater repair or service pros.

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

Avatar for Heritage Home Service

Heritage Home Service

4.54(
983
)
Approved Pro

Heritage Home Service

4.54(
983
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
27 local quotes requested

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Southern Maine. Bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service. Our namesake is about honoring those who came before us, and most importantly, it is about leaving a legacy of serving people extraordinarily well. For over 37 years in business, we have helped countless families across our community stay comfortable and healthy in their homes, and today we continue to evolve and find new ways to serve you even better.

"Install was done in a timely manner. "

Robert R on September 2025

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Southern Maine. Bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service. Our namesake is about honoring those who came before us, and most importantly, it is about leaving a legacy of serving people extraordinarily well. For over 37 years in business, we have helped countless families across our community stay comfortable and healthy in their homes, and today we continue to evolve and find new ways to serve you even better.

"Install was done in a timely manner. "

Robert R on September 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
176 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


"Bob and Matt replaced our Rianni tankless water heater. They were prompt, professional, friendly and informative. They did a great job and I would recommend them to anyone."

Linda & B on July 2025

Heritage Home Service is a premier home service provider operating in New Hampshire, Massachusetts and Maine – bringing all the perks that come with having a large team while maintaining a strong focus on family-oriented service.

"Bob and Matt replaced our Rianni tankless water heater. They were prompt, professional, friendly and informative. They did a great job and I would recommend them to anyone."

Linda & B on July 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 Lakewood Handyman

Lakewood Handyman

No reviews yet

Lakewood Handyman

No reviews yet

My name is Brandon Wood, I have been in the carpentry business for 4 years! At the beginning of 2023 I opened my own business, Lakewood Handyman. I can do all jobs big and small! I am a licensed heat pump installer, and I specialize in all things flooring. I do however provide all handyman services big and small such as; Remodels, demo, drywall, ceilings, roofing, deck building, tiling, painting, plumbing, landscaping, waste removal, you name it! If I am unable, I will be honest!

My name is Brandon Wood, I have been in the carpentry business for 4 years! At the beginning of 2023 I opened my own business, Lakewood Handyman. I can do all jobs big and small! I am a licensed heat pump installer, and I specialize in all things flooring. I do however provide all handyman services big and small such as; Remodels, demo, drywall, ceilings, roofing, deck building, tiling, painting, plumbing, landscaping, waste removal, you name it! If I am unable, I will be honest!


Avatar for Triple M Handyman

Triple M Handyman

No reviews yet

Triple M Handyman

No reviews yet
3 years of experience

Triple M Handyman specializes in small home repair and improvement projects. We offer services such as TV wall hanging, storm door installation, painting, wall repairs, door and window repairs, plumbing fixture repair or replacement, and much more! We can get your to-do list done. We offer straight-forward, convenient pricing. Most jobs can be quoted virtually, before we arrive by visiting our website. We are currently owner operated, and the owner has over 20 years experience in the handyman field. As we look to expand we only hire only qualified professionals that we can feel confident will give our customers the best experience possible.

Triple M Handyman specializes in small home repair and improvement projects. We offer services such as TV wall hanging, storm door installation, painting, wall repairs, door and window repairs, plumbing fixture repair or replacement, and much more! We can get your to-do list done. We offer straight-forward, convenient pricing. Most jobs can be quoted virtually, before we arrive by visiting our website. We are currently owner operated, and the owner has over 20 years experience in the handyman field. As we look to expand we only hire only qualified professionals that we can feel confident will give our customers the best experience possible.


Avatar for Winnipesaukee Heating & Cooling, Inc.

Winnipesaukee Heating & Cooling, Inc.

No reviews yet

Winnipesaukee Heating & Cooling, Inc.

No reviews yet
10 years of experience

We are a local company focusing on customer satisfaction. We do take on subcontracting contracts, but we do not subcontract out. We are a payment on completion company, so please have a check ready upon completion of the job. We are currently running a $199 air conditioner cleaning special, does not include parts, freon or labor for major issues.

We are a local company focusing on customer satisfaction. We do take on subcontracting contracts, but we do not subcontract out. We are a payment on completion company, so please have a check ready upon completion of the job. We are currently running a $199 air conditioner cleaning special, does not include parts, freon or labor for major issues.


Maine Street Plumbing Services

No reviews yet

Maine Street Plumbing Services

No reviews yet
16 years of experience

Available for service by appointment Mon-Fri 7AM- 6PM. After hours services also available. On call nights and weekends for emergency service.

Available for service by appointment Mon-Fri 7AM- 6PM. After hours services also available. On call nights and weekends for emergency service.


J & W CONTRACTING

5.00(
1
)

J & W CONTRACTING

5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Current number of employees: 3 (Variable depending on scale of work) Sub-contracing for larger job and advanced electrical and plumbing. We currently do not accept credit cards as a form of payment. Call us for all other billing inquiries.

Current number of employees: 3 (Variable depending on scale of work) Sub-contracing for larger job and advanced electrical and plumbing. We currently do not accept credit cards as a form of payment. Call us for all other billing inquiries.


Odd Job Rob

No reviews yet

Odd Job Rob

No reviews yet

Now that people are spending more time at home, projects are popping up everywhere. Looking for someone to finish up your home projects? Give me a shout. I wear proper PPE and will work with your and your schedule to get the job done! No Job is to small!

Now that people are spending more time at home, projects are popping up everywhere. Looking for someone to finish up your home projects? Give me a shout. I wear proper PPE and will work with your and your schedule to get the job done! No Job is to small!

...
Showing 1-10 of 580
FAQs for water heater repair or service projects in Portsmouth, 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 Portsmouth, 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.