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

Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,404
)
Tankless Water Heater - Repair

Serving Merrimac, 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 Morris Heating & Air Conditioning
Morris Heating & Air Conditioning
4.8(
81
)
Tankless Water Heater - Repair

Serving Merrimac, MA and surrounding areas

Approved

In business since 1998

Free estimates

Emergency services offered

"Zach Brown initially came to fix leaking water situation and then realized there was damage due to water seepage. After that damage is repaired, Zach will return to put plumbing back in order, including replacing faucets which had to be cut out to allow removal of granite countertop, reconnect water lines and possibly reinstall a new Reverse Osmosis system since the old one had to be removed. Can't say enough about Zach -- his professionalism, his explanation of what's being done and options for replacing/improving plumbing under kitchen sink, pipes, etc."
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+8

4 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Spencer Home Services
Spencer Home Services
5.0(
25
)
Tankless Water Heater - Repair

Serving Merrimac, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1980

Free estimates

Emergency services offered

"This was an emergency service call. Main water supply pipe from street to our house had failed. They responded to call within 45 minutes, evaluated issue, gave us price, Within another half hour equipment showed up. Staff was friendly professional and efficient. Start to finish from initial phone call to replaced main with running water re-established was just over 4 hours. Really impressive company with great customer service. Thank you!"
Repairs
Under Slap Installation
Equipment
Equipment
Equipment

+9

4 neighbors recently requested a quote
Recommended by69%of homeowners
Avatar for Borels Plumber Inc
Borels Plumber Inc
5.0(
11
)
Tankless Water Heater - Repair

Serving Merrimac, MA and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"These guys are great. Water heater broke and was leaking all over the cellar. They replaced my water heater and had everything done within a couple of hours. Highly recommend them and I will definitely use them again."
Water heater replacement
Water heater replacement
Bathroom remodeling
Bathroom remodeling
Kitchen remodeling

+4

Response time2 hrs
Response rate100%
Avatar for Maffei Plumbing and HVAC, LLC
Maffei Plumbing and HVAC, LLC
3.8(
12
)
Tankless Water Heater - Repair

Serving Merrimac, MA and surrounding areas

Approved (Corporate)

In business since 2010

Free estimates

Emergency services offered

At Maffei Plumbing and HVAC, LLC, we are committed to your comfort. With an experienced and qualified staff to provide quick service for any service needed. We can solve any problem with a friendly face. Give us a call for a free estimate.

Air Conditioning Installation
Rinnai Tankless
Water Filtration
Heating Systems
Heating Systems

+6

Response time1 day
61 neighbors recently requested a quote
Recommended by12%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.1(
1,316
)
Tankless Water Heater - Repair

Serving Merrimac, MA and surrounding areas

Approved (Corporate)

In business since 1988

Free estimates

Emergency services offered

"Angel was exceptional, professional, efficient, clean and responsive to every request, fixed numerous issues related to my toilets, noticed a flooring issue that we are now addressing and diagnosed a water heater issue that had been attributed falsely to a foundation issue saving us thousands. They are expensive compared to many but worth every penny we spent."
Career fair
Team breakfast
Festivals and events
Golf tournament
Heritage Helps initiatives

+27

Recommended by91%of homeowners
Avatar for NETR Inc
NETR Inc
4.7(
78
)
Tankless Water Heater - Repair

Serving Merrimac, MA and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"

I called Kris U. in a panic because an unethical contractor had totally messed up our very expensive HVAC system, and the condensers had been sitting unconnected for 18 months! Called Sila, they had no idea what to do. Called Kris and he sent in Gregg H. to reconnect everything, drain the condensers and recharge them again. He did a great job and it turned out we did not have to buy new condensers -- hooray!

I highly recommend this company, since no one else was willing or had the inclination to tackle this.

"
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
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+9

3 neighbors recently requested a quote
Recommended by91%of homeowners
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