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Top-Rated Tankless water heater repair pros in Somerville - Updated Nov 2026

Avatar for Mouradian Plumbing & Heating
Mouradian Plumbing & Heating
4.7(
19
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"Highly satisfied AGAIN in a second job with Mouradian (hot water heater earlier). This time was a replacement of leaking cast iron sink waste pipe imbedded in the wall/floor between two condo unit bathrooms. Eric Mouradian is very no-nonsense, fast in his estimates, and reasonable in his pricing. The plumber who did the job, Rich, was excellent: friendly, efficient, and clear about what was going on. He understood immediately that his first instinct, to open up the ceiling and wall of the downstairs bathroom should be avoided if possible, to limit wall repairs to one bathroom instead of two. And he then quickly figured out how to do it and did it. The cost was considerably less than the quote of a competitor, who misdiagnosed the problem at first, refused to put his quote in writing, and showed no interest in keeping wall damage to a minimum. No comparison."
Response time1 day
Recommended by100%of homeowners
Avatar for Gentille Plumbing and Heating
Gentille Plumbing and Heating
5.0(
28
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"This was a relatively small water heater repair, and Ryan did an outstanding job. He responded immediately to my request, provided a reasonable quote, was polite, professional, knowledgable, and friendly to deal with. Will definitely hire again if needed."
Response time6 hrs
Response rate96%
28 neighbors recently requested a quote
Avatar for Genove Oil & Air Co
Genove Oil & Air Co
4.7(
217
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Excellent. The serviceman arrived on time, was knowledgable. He explained what he was doing. He went right to work and completed his work in an appropriate amount of time. Very pleased with their work. Already set up an appointment for the fall heater tuneup!"
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+2

Response time12 hrs
Response rate100%
12 neighbors recently requested a quote
Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,404
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Live Your Most Comfortable Life with a Company You Trust. \nWe offer Same Day Service and Next Day Installation! \n \nSila 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. \nWe guarantee satisfaction and are proud to have earned over 7,000 ?A? ratings on Angie?s List and its prestigious Super Service Award!

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+6

65 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Comfort Professor
Comfort Professor
5.0(
24
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"A different company gave us a quote for $500 to clean the condenser and $2500 to recharge it to check for leaks, so we were dragging our feet. I decided to get another opinion and found Comfort Doctor. They were incredibly responsive and came the next morning. They cleaned the unit for $65 and recharged the unit right then and there with 1 lb of refrigerant. Now it is working great for ~$300. The technician gave us recommendations as if it were his own home and said the quick and inexpensive fix is where you should start. We might not need to do the more expensive leak-check at all unless the system continues to leak substantially."
10 neighbors recently requested a quote
Avatar for Boston Plumbing - Heating Solutions
Boston Plumbing - Heating Solutions
4.9(
27
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

In business since 2025

Free estimates

"By the time I found Joe’s business, the water heater had been deemed dead’s by the manufacturer, it was Sunday afternoon, a blizzard was to start around 8:00pm. Joe and his partner took out the old heater, drove with me to HD picked up the new one, installed it and I had hot water before the first snow flakes hit the ground. The price was very reasonable too, regardless of the circumstances. Two thumbs up and five stars."
Boiler installation
Boiler installation
Boiler installation
Boiler installation
8 neighbors recently requested a quote
Avatar for Johnny Rocket Plumbing & Heating
Johnny Rocket Plumbing & Heating
5.0(
8
)
Tankless Water Heater - Repair

Serving Somerville, MA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"John “Johnny Rocket” & his associate did an amazing job servicing my home in Winchester. From the moment they walked through the door, they exuded a friendly, knowledgeable and professional manner. They were quick to diagnose the issue in my heating system & worked efficiently to fix the issue on the spot. The entire job was complete in under an hour. I needed a new thermostat & John installed one on the spot as well! I highly recommend hiring these two gentleman for any of your plumbing & heating needs. After the job was complete, they even took the time to talk my son & I about how they enjoyed helping residents in the local Winchester Community. (They are both former Winchester High School graduates.) I would give Johnny Rocket 10 stars ⭐️ if I could. Look No Further! -Emily (Long time Winchester Resident)"
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+10

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