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

Avatar for Domination Plumbing and Heating
Domination Plumbing and Heating
4.6(
23
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"After spending 2 days trying to find someone to replace my hot water heater, Home Advisor recommended this company. They fit me into their schedule the same day and it was installed about 4 hours after my initially contact with them. Casey and Phil were great. Had them look at a couple of other minor future projects to do while they were here. Will definitely hire them again."
Custom Work
Custom Work
Custom Work
Custom Work
Custom Work

+20

Response time4 hrs
Response rate96%
13 neighbors recently requested a quote
Avatar for Advanced Energy Concepts of Worcester, Inc.
Advanced Energy Concepts of Worcester, Inc.
3.8(
140
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"Could not be happier with the install of our new propane system. They were very easy to work with Quinn answered all my questions Doug and Bernie and I forget the other guys name were a pleasure to have in my house. They did the work and the Quoted amount of time. They handled all the inspections and permits with the town. Extremely happy with the level of service and would recommend to anybody looking for heating needs. Edit from 2 years ago?. The company still has not picked up old water heater and boiler. Have called a number of times to get this done. Vicki is extremely unpleasant to deal with. Rude. Has zero phone skills. Should really look into finding a new person to answer the phones. She was basically yelling at me for asking, follow up questions. And when I I said, why are you yelling? She said so you would know if I was yelling at you. But she definitely was yelling. I really hope those phone calls are recorded. They?ve got their money. So obviously the customer service ha"
Response time3 days
Response rate85%
33 neighbors recently requested a quote
Avatar for Heritage Home Service
Heritage Home Service
4.6(
22
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

Approved (Corporate)

In business since 2018

Free estimates

Emergency services offered

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.

Garbage disposal
Bathroom plumbing
Water heater
Water Filtration
Plumbing maintenance

+19

Response time9 hrs
Recommended by84%of homeowners
Avatar for Pro Comfort Control
Pro Comfort Control
5.0(
20
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

In business since 2016

Credit card accepted

"They were super helpful and quickly responded when my water heater leaked. They promptly replaced it and they then came out yesterday and completed and AC tuneup to my system. Highly recommend Pro Comfort Control!"
Ductless Mini Split A/C Heat Pump
Heating & A/C Project
Heat pump condenser
After
Heating and Air Conditioning Project

+74

Recommended by100%of homeowners
Avatar for Wachusett Plumbing Services
Wachusett Plumbing Services
4.6(
11
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Dennis did an excellent job replacing our electric water heater! We noticed our old one leaking one evening, and Dennis was VERY fast to respond to my Angi request for service. He was out the next day to install our new water heater and arrived promptly at the promised time. From start to finish, Dennis completed the work in just over 2 hours. He cleaned up the area nicely and took our old water heater with him. A+ 5-Star service for sure! Would highly recommend this friendly professional for your plumbing needs. :)"
Recommended by100%of homeowners
Avatar for Damaso Plumbing and Heating
Damaso Plumbing and Heating
4.7(
16
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

In business since 2012

Emergency services offered

Credit card accepted

"One night around 10:30 I happened to notice water leaking out of somewhere in my boiler room. I panicked and called Damaso Plumbing. This is the first time I called them and Brian called me back immediately and was out at my house within 30 minutes to stop the leak. It ended up being my expansion tank that had corroded and sprung a leak. Brian was able to use a temporary tank to get me through the night with heat and hot water until the next day when he returned with a new tank. Brian was extremely knowledgeable, helpful and polite. I would definitely recommend him to others and I will be using him again myself."
New Combi Boilers
Radiant Heating
Plumbing underground
New Master Bath
New Combi Boilers

+56

Recommended by86%of homeowners
Avatar for All Phases Mechanical
All Phases Mechanical
4.5(
75
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

In business since 1983

Free estimates

Emergency services offered

"Our experience with All Phases Mechanical has been excellent. On the first occasion we used APM, we lost heat during a cold snap in the middle of winter. We called in the morning and a technician arrived that afternoon and quickly determined that not only was our 20 year old furnace in need of expensive repairs (which a friend of ours in the construction industry validated), but continuing to run it would potentially result in a carbon monoxide hazard to my family. Carl gave us clear options and helped us understand benefits (rebates, no interest loans, etc.) that are available from the state to assist families in our predicament. We decided to move forward with a new furnace and Carl's team installed it the next day. On the second occasion, APM helped us our central air conditioning system. Again, Carl sent a technician who arrived promptly the same day, who determined that the air conditioning system was fine but it wasn't working properly due to faulty wiring. He quickly fixed it and was on his way - all at no charge. I can't say enough about All Phases Mechanical. If you're looking for a local company that cares about its customers (and understands that heating and cooking problems need to be addressed quickly), All Phase Mechanical is the company you should use."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

Recommended by90%of homeowners
Avatar for RezySave Plumbing and Heating
RezySave Plumbing and Heating
4.9(
23
)
Tankless Water Heater - Repair

Serving South Lancaster, MA and surrounding areas

Warranties offered

Small jobs welcome

Credit card accepted

"Had mike and zach out to replace my gas water heater. They were on time, professional, and courteous of my home. They even wear shoe covers and use drop mats to make sure the floors dont get dirty! Excellent customer service at a reasonable price"
Water heater install
Hybrid water heater
16 neighbors recently requested a quote
Showing 1-10 of 45