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Find Water heater repair or service pros in Merrimack

Avatar for Robert Johnson Plumbing
Robert Johnson Plumbing
5.0(
294
)

Angi Approved

Super Service Award Winner

In business since 2009

Free estimates

Customers say: True professional

"Robert did a great job replacing our electric hot water heater. He has great communication and workmanship skills. He did not take advantage of us with his material and Labor cost, very reasonable. My wife would highly recommend him "
38 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.7(
4,795
)

Angi Approved

In business since 1989

Free estimates

Emergency services offered

"No invoice transparency at Sila Heating, Cooling, Plumbing, and Electrical. I had an appointment on February 16, 2026, to troubleshoot a no-heat issue on the second floor of my home. I was told the repair would be $1,500. Although hesitant, I agreed to proceed because I needed heat. The repair was completed, I paid $1,524.90, and the technician left. I later realized I had not been provided with an invoice, so I called the company directly at 781 438 4114. The person who answered the phone emailed me an invoice. The invoice listed an HVAC diagnostic fee of $69.00, followed by ?HYD 170,? with no price or itemized breakdown provided. I understand that professional services and parts can incur significant costs, it is unreasonable that the part alone could account for the entire charge without any supporting documentation. I respectfully requested a detailed breakdown of the invoice through multiple phone calls and emails; however, the responses I received were dismissive and failed "
51 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Daigle Plumbing Heating and Cooling
Daigle Plumbing Heating and Cooling
4.4(
35
)

Angi Approved

In business since 1981

Free estimates

Customers say: True professional

"I believe I was scammed. I had two other plumbers after job was done and they laughed at the amount of money I paid for the job. It is more than double what they would have charged me. Had I known! I also ended up signing a contract for up to a year deduction on my credit card. After I paid them more than $4,000 for less than 8 hours of work. I must have had a really bad day to have agreed to this. The gentleman was so nice that it never occurred to me that they were taking advantage of me as a senior citizen."
110 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for Petro Home Services
Petro Home Services
4.1(
146
)

In business since 1903

Emergency services offered

"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."
Recommended by80%of homeowners
DirectLine Plumbing & Heating
New to Angi

In business since 2004

Emergency services offered

DirectLine Plumbing & Heating is a full service company. Commercial-Residential-Industrial. We have a list of excellent subcontracts if needed and our prices cannot be beat-We also have a great rebate program for water heaters (must qualify)! All work is 100% guaranteed.

Sam Multi-Service Center
New to Angi

In business since 1999

Sam Multi-services Center

Walpole Emergency Plumbing
New to Angi

In business since 1994

Free estimates

Emergency services offered

We are a family operated business that has been going in business since 1994, specialising in various areas of plumber related work as well as heating and blocked drains, we also have a 24 hour emergency plumber at hand. We offer a complete maintenance service for any size project for both residential and commercial applications.

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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.