Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in Hauppauge, NY

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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

Avatar for RDS Plumbing and Heating
RDS Plumbing and Heating
4.7(
146
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Small jobs welcome

Offers commercial services

"Rich was a life saver. My hot water heater sprung a leak at a valve at 4pm on a sunday night. Had boiling hot water leaking all over. Called RDS up and they said they would be there within the hour. Came found the problem and replaced the valve and they were back on the road by 6pm. saved me from having a very miserable sunday night. Thanks Again."
Response time7 hrs
Response rate86%
Recommended by49%of homeowners
Avatar for Surefire Mechanical Corporation
Surefire Mechanical Corporation
4.5(
157
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"I sent a message to the company in the late evening regarding my broken central AC and Jason was here Tuesday morning to look at it. He tried to repair it but was not able to due to the age of the unit and the damage. We needed a new unit and he was here to put it in first thing Wednesday morning. Took him two hours and our AC was working. He was nice and professional. We felt the price was reasonable. Would use him again and recommend his business."
4 Zone Navien Boiler
1st Floor AC System
Hi Efficient Heat and Hot Water
Snow melt sensor
Manifold

+14

Response time10 mins
Recommended by97%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Kevin was great! The rest of the company not so much. Kevin diagnosed the problem immediately as the thermostat, had a replacement in the truck, and completed the installation of the new unit quickly. He showed me how to program the updated version, and everything seemed to be fine - until the next morning. Turned out the replacement was defective. When I called, I was told that they might not be able to get back to me that day, but Kevin interrupted his schedule to come back and put in a new (and working) unit at no charge."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
A&M Plumbing & Heating
4.8(
13
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

We are a locally owned and operated business committed to providing exceptional service, quality workmanship, and honest communication on every project we undertake. Our experienced team takes pride in delivering customized solutions tailored specifically to meet each client's unique needs. We value integrity and reliability, ensuring every job is completed to your satisfaction. Our goal is to build lasting relationships with our customers through consistency, professionalism, and outstanding results. Let us show you why homeowners continually choose us as their trusted service provider.

Avatar for BERARDI ELECTRICAL CONTRACTING, INC.
BERARDI ELECTRICAL CONTRACTING, INC.
3.7(
72
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"I hired the SP and bought a heater/air conditioner and I paid him $500 deposit. He wired the garage after I paid him $650. He has not delivered the heater/ac unit. He did not wire the 240 volt line into garage. The track lighting and one outlet do not work. He stated he would come back on 2 different times and never did. He will not return calls or texts. He never put the cover on the outside outlet either."
Lido beach NY
Lido beach NY
Lido beach NY
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Handy Hubby
Handy Hubby
3.3(
43
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"I called and happened to get Steve right away and since he was in the area he came right over. He examined the blind to determine if it could be fixed without a replacement piece and since it could he did the repairt quickly and efficiently. He was reasonable and very pleasant."
Stand Alone  Structure
Painted wood porch
Large deck and covered area
Large deck and covered area
Before - Pad removed

+5

Recommended by78%of homeowners
Avatar for Energywise, Inc.
Energywise, Inc.
1.0(
1
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 1985

Emergency services offered

Warranties offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time2 hrs
HomeServe of Long Island
2.5(
1
)
Tankless Water Heater - Repair

Serving Hauppauge, NY and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

HomeServe Energy Services (HES) provides reliable heating and cooling experts that service over 1,000 communities in 26 counties across New York, Massachusetts and Rhode Island, from five “depot” sites supporting metro New York, southern New Jersey, Rhode Island and eastern Massachusetts. With almost 200 technicians (including certified refrigerant handling technicians and NATE-certified technicians), HomeServe provides emergency heating, cooling and water heater repairs as well as tune-ups and new equipment installations. \n

...
Showing 1-10 of 126