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Find Water heater repair or service pros in Merrimack

Joe Belanger, Plumbing Services
4.5(
130
)

Serving Merrimack, NH and surrounding areas

Approved

In business since 2003

Free estimates

Customers say: Quality work

"Joe is an excetant professional contractor, he provided a very competitive quote for the replacement of a propane hot water heater. He was able to do the work the same day as he provided the quote. Work is clean neat and very professional looking. Would not hesitate to contact Joe again on any future heating and plumbing needs."
Buderus oil fired forced hot water heating system
Oil fired buderus
Navien 150 high efficiency wall mounted boiler
Water heater
Powervented water heater

+1

Response time1 day
Recommended by94%of homeowners
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,397
)

Serving Merrimack, NH and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"Sila Heating and Air Conditioning is the only service I found that can service my Buderus oil burner. John was the tech this time and he did an excellent job of taking care of the burner and then explaining the problem that arose with my chimney liner. Since I didn't have heat or hot water until the liner was fixed, I had to use a company I didn't know as an emergency repair. I was able to speak with their tech using the information provided by John and therefore felt comfortable with the costly repair. John even came back after his last call to turn the burner back on. I have the warranty on my burner so I pay a discounted price and have the coverage if I need it."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

Response time2 days
66 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for ADVANCED PLUMBING LLC
ADVANCED PLUMBING LLC
5.0(
60
)

Serving Merrimack, NH and surrounding areas

Approved

In business since 2017

Emergency services offered

Warranties offered

Grand Voyage Plumbing and Heating 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. We have 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.

Water Heater
Water Heater
10 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Daigle Plumbing Heating and Cooling
Daigle Plumbing Heating and Cooling
4.3(
38
)

Serving Merrimack, NH and surrounding areas

Approved

In business since 1981

Free estimates

Credit card accepted

"Justin was professional and knew exactly what I needed to fix my existing water heater without trying to upsell me on a much more expensive tankless water heater. He had the relief valve and expansion tank in his truck and was able to install everything without issue. I would recommend hiring them for your plumbing needs!"
9 ZONE On Boiler
3 Zone Boiler
4 Zone Boiler with storage Tank!!!
Oil Tank
6 Zone Boiler W/Storage Tank

+12

Response time1 day
105 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for Expedition Plumbing
Expedition Plumbing
5.0(
9
)

Serving Merrimack, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"?I couldn't be happier with my new water heater installation. The team was professional, punctual, and incredibly efficient. They took the time to explain the new unit's features and ensured the workspace was spotless before leaving. ?It?s a relief to have hot water back with zero stress. If you need a reliable install, I highly recommend Expedition!"
Expedition Plumbing
21 neighbors recently requested a quote
Avatar for Walley’s Heating & Air Conditioning
Walley’s Heating & Air Conditioning
4.8(
110
)

Serving Merrimack, NH and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"I was referred to Walley's by a friend after experiencing trouble getting someone in to service my burner. When I called, I spoke to several courteous and professional staff members who went the extra mile to help me. I was concerned because the burner was running loud and we had already experienced a "puff back" on our old burner and didn't want to risk that again, and we had just started having a leak from what looked like an overflow pipe. I also mentioned that I had radiant heat in one room and needed an experienced technician that could manage the anti-freeze in the system. When I told Mandy the problem, she checked with Walley Sr. and he scheduled one of his best technicians to handle our job and got him out to us within a few days. Our technician, Alex, was polite, knowlegedable, professional and honest. He told me, as well as showed me everything he was doing, asked me to inspect the burner before putting it back together and did a very comprehensive inspection. Alex found that our leak was coming from a broken pressure valve which he had on his truck and replaced immediately. After 4 hours of Alex working at our home, we recieved a follow-up customer service call to make sure we were happy with the work Alex did and wondering if we had any questions or concerns. Wow! I was impressed! I plan to continue using Walley's and look forward to a long relationship with them."
Three-Zone Viessmann® Boiler.
Daikin® White Emura Indoor Unit
Viessmann® Wall Hung Boilers Fit in Tight Spaces.
Daikin® Silver Emura Indoor Unit
Viessmann®. A Perfect Fit.

+56

Response time12 hrs
Response rate93%
Recommended by95%of homeowners
Showing 1-10 of 48
FAQs for water heater repair or service projects in Merrimack, 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 Merrimack, 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.