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

Avatar for Robert Johnson Plumbing
Robert Johnson Plumbing
5.0(
328
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Free estimates

Customers say: True professional

"I had Rob install a tankless hot water heater, whole house water filter, and run a new gas line for my gas stove conversion. He was very professional and and was quick to set an appointment. The whole job took a single day and he even removed and disposed of the old outdated appliances. Quality work at reasonable prices! Would highly recommend."
Response time2 hrs
Response rate96%
38 neighbors recently requested a quote
Joe Belanger, Plumbing Services
4.5(
130
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

Approved

In business since 2003

Free estimates

Customers say: Quality work

"Joe is an excetant professional contractor, he provided a very competitive quote for the replacement of a propane hot water heater. He was able to do the work the same day as he provided the quote. Work is clean neat and very professional looking. Would not hesitate to contact Joe again on any future heating and plumbing needs."
Buderus oil fired forced hot water heating system
Oil fired buderus
Navien 150 high efficiency wall mounted boiler
Water heater
Powervented water heater

+1

Response time7 hrs
Recommended by94%of homeowners
Avatar for Daigle Plumbing Heating and Cooling
Daigle Plumbing Heating and Cooling
4.4(
43
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

Approved

In business since 1981

Free estimates

Credit card accepted

"Justin was professional and knew exactly what I needed to fix my existing water heater without trying to upsell me on a much more expensive tankless water heater. He had the relief valve and expansion tank in his truck and was able to install everything without issue. I would recommend hiring them for your plumbing needs!"
9 ZONE On Boiler
3 Zone Boiler
4 Zone Boiler with storage Tank!!!
Oil Tank
6 Zone Boiler W/Storage Tank

+12

Response time1 day
104 neighbors recently requested a quote
Recommended by63%of homeowners
Avatar for Skovron Mechanical Services
Skovron Mechanical Services
4.1(
85
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Excellent communication from Keith; outstanding service from Roger. Professional, timely, and reasonably priced. They came in under estimate on my boiler repair and advised that a second bit of work that had previously been discussed was not going to be necessary. I will definitely use them again and highly recommend them!"
Commercial Cooling
Before Oil Boiler
Old
Oil Boiler
HVAC Roof Top Unit

+19

Response time9 hrs
Response rate100%
Recommended by84%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.1(
1,337
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

Approved (Corporate)

In business since 1988

Free estimates

Emergency services offered

"I asked for a rep to come to give quotes for repair or replacement of my gas boiler. Before he came the old boiler failed, and Heritage was able to quickly install a new one so that we without heat and hot water for only a short time."
Grand opening of new location
Team breakfast
Events
Billy working hard
Golf tournament

+29

Response time5 hrs
351 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for TJ Thistlewood Plumbing & HVAC
TJ Thistlewood Plumbing & HVAC
5.0(
6
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

Emergency services offered

"Tyler & his team were very professional and thorough with repairing my tankless water heater. Tyler was quick to respond to my call for a repair service call and took the care to be as neat as possible during the repair and cleaned up nicely when the service was completed. TOP NOTCH !!!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

Recommended by100%of homeowners
Avatar for GMR Mechanical
GMR Mechanical
4.4(
56
)
Tankless Water Heater - Repair

Serving East-derry, NH and surrounding areas

In business since 2008

Free estimates

Emergency services offered

"Gil responded very quickly to my initial email with a phone call. I described the problem with my washing machine. He was able to come the next morning and was at my house exactly when he said he would be. He quickly determined and fixed the problem! I was doing a load of laundry within an hour and a half! He gave me some tips on maintaining my washer and even checked out an issue I was having with my stove. He seemed to be both knowledgeable and honest. I will definitely be calling Gill's the next time I have an appliance that needs repairing."
Recommended by83%of homeowners
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