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

Avatar for S&S Piping and Heat LLC
S&S Piping and Heat LLC
5.0(
66
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"Neo was excellent! My water heater went and a new one was installed by Neo and his team the next day. They were very professional, communicated instantly, and did a fantastic job. Will definitely use S.S Piping n Heat for all of my future plumbing and heating needs. Would recommend this company to anyone!"
Metro Construction Design
Metro Construction Design
Metro Construction Design
Metro Construction Design
Metro Construction Design

+53

Response time1 day
Response rate100%
11 neighbors recently requested a quote
Avatar for Gentille Plumbing and Heating
Gentille Plumbing and Heating
5.0(
28
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Credit card accepted

"My grandson flushed his little yellow bus down the toilet Friday afternoon. I called several plumbers in the area. By late Saturday afternoon I had only 1 returned call saying they could come out Monday morning. A friend suggested I call Gentille Plumbing and Heating. I called them and they said they could come early Sunday morning. Ryan arrived promptly as promise and quickly determine how to approach the issue and retrieved the little yellow bus. Cleanup was quick and pricing fair. Ryan was professional , friendly and was on his way within 45 minutes of arrival. Thank You Gentille Plumbing and Heating"
Response time6 hrs
Response rate96%
23 neighbors recently requested a quote
Avatar for H L Bowman
H L Bowman
4.6(
430
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved (Corporate)

In business since 1946

Free estimates

Emergency services offered

"They were very fast to respond to my call and were able to send someone within two hours. The replacement of the hot water heater went well. For the water pipes they use copper crimp fittings instead of soldering so it will be interesting to see how that holds up over the years. My only concern is how they ran the gas line. They use Gastite CSST which is fine, but the CSST is run so it goes downward then back up and then downward again before it enters black pipe that has a moisture trap. It seems to me that if there is any moisture it will end up in the CSST instead of the trap. In addition, there is a pretty good bend in the CSST right before it goes into the trap section. Also, Teflon tape was used on the all the joints instead of joint compound. I think I will get someone from a different company to come in and take a look at it."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

461 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Comfort Professor
Comfort Professor
5.0(
24
)
Tankless Water Heater - Repair

Serving Millis, 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 Cotti-Johnson Heating-Cooling-Plumbing-Electrical MA
Cotti-Johnson Heating-Cooling-Plumbing-Electrical MA
4.6(
231
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved (Corporate)

In business since 1944

Free estimates

Emergency services offered

"Responded immediately to the side effects of a water break in the house. Immediately restored electrical services to dry areas, came back a few days later to restore more services. Gave detailed proposal before work was initiated, had enough supplies on truck to immediately replace most of affected parts. and advised on purchase of replacement fixtures. The technician was cheerful and understood my goals in restoring service."
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation

+56

Response time9 hrs
Response rate97%
83 neighbors recently requested a quote
Avatar for Terrence Forbes
Terrence Forbes
5.0(
9
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Hired Forbes Plumbing for a full basement bathroom install. Was a complicated job that required out of the box thinking due to low ceiling heights. Terrence managed to find multiple solution to allow for proper shower height and our desired designed. Was super impressed with the service ; he was on time friendly and knows his stuff. Would definitely recommend. I also had him do a propane gas install after to accommodate my barbecue and that was top-notch as well."
Water heater
Electric water heaters
Pressure vacuum breaker
Pressure vacuum breaker
Full bath and kitchen

+23

57 neighbors recently requested a quote
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
522
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved

In business since 1928

Emergency services offered

Warranties offered

"I couldn't recommend these guys more. We had a 21-year old boiler replaced and upgraded, and a new hot water tank installed. I can't think of a single way they could have improved the whole process. From start to finish, they were knowledgeable, on time, clean, considerate, extremely professional and they did exactly what they said they would. The also installed a temporary hot water tank and left electric space heaters on the one night the burner was out of service. Everything is now working as they said it would, and a big bonus is their workmanship actually LOOKS great too! A+++"
Additional Photos
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Additional Photos
Additional Photos
28 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Peters plumbing & Heating
Peters plumbing & Heating
5.0(
6
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved

Free estimates

We are 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. \n

Peters plumbing & Heating
24 neighbors recently requested a quote
Avatar for Rodenhiser Home Services, Inc.
Rodenhiser Home Services, Inc.
4.7(
6
)
Tankless Water Heater - Repair

Serving Millis, MA and surrounding areas

Approved (Corporate)

In business since 1928

Free estimates

Emergency services offered

Rodenhiser Home Services provides residential plumbing repairs, maintenance, and installations across Massachusetts communities. Serving local homeowners since 1928, our plumbing team helps with leaking pipes, clogged drains, faucets and toilets, water heaters, sump pumps, and whole-home water treatment.\n\nWhether you have no hot water, a recurring drain problem, or a plumbing upgrade in mind, we explain our findings and present upfront options before you authorize the work. Our services include tank and tankless water heaters, fixture replacement, water piping, drain clearing, and water-filtration solutions.\n\nOur Plumbing, HVAC Service, HVAC Installation, and Electrical profiles represent the same Rodenhiser Home Services, Inc. company, organized by service category. Our plumbing expertise is backed by professional workmanship and respect for your home.\n\nTell us what is happening and we can arrange your plumbing appointment. Ask about free water testing while our plumbers are onsite!

Sump Pump
Whole Home Filer
Water Filtration
Shower Fixtures
Pipe Rebuild

+7

Response time1 day
19 neighbors recently requested a quote
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