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

Avatar for Surefire Mechanical Corporation
Surefire Mechanical Corporation
4.5(
157
)
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Professional,prompt and attentive. The previous company installed low quality parts and I continued to have problems. Surefire installed what appears to be good quality parts and my heating system is still working. I would definitely use them again and would also recommend to my family and friends. They are also reliable and prompt. They gave me a window period between 8-10 and they arrived at my house at 10:00. Many companies will have you waiting all day but not Surefire. I want to thank them for a job well-done."
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 Greenlawn, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"I called All Weather to give me a quote for replacing my gas boiler. They set up a time for their salesperson to come over and give me a quote. The appointment was only a few days later and a man named Joe showed up on time. He spent some time with me, I told him I was looking for a new boiler and a new hot water heater, but I wanted to see what options I have (since I was debating going to a tankless water heater). He told me going indirect hot water tank is the best option and they always use this brand that's the "best one out there". Even though he may have been right, he didn't tend to my questions or concerns very well. I felt like he was getting annoyed that I had questions and eventually I just let him run the show just to get him out of my house faster. Especially when he gave me a quote of $8600, it was much higher than I was anticipating. One thing I really didn't like was when he said I'd have to get a permit since I live in an incorporated village, which would be an extra $500, meanwhile I already had another plumber tell me a permits only $200. So I went with another company. So even though I can't rate All Weather on their work quality, I didn't get a good feeling from their salesperson."
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+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Precision Plumbing Plus Heating Inc
4.8(
6
)
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"We were blown away by the quality, efficiency of work, attention to detail and customer service of Precision Plumbing & Heating from the very first interaction and throughout the entire process. Over-the-phone and in-person James was professional, highly communicative and an absolute pleasure to work with. Our telephone call was responded to immediately. James came over the very same day to review our list of items we were considering having done. Clear and intelligent advice was provided and a reasonable quote was submitted the next day; work was scheduled for a couple of days later that was able to meet out tight deadlines for getting the work accomplished. The list was long...old corroded jumbled waste pipes, in danger of failure, were expertly replaced. A couple of old damaged faucets were replaced cleanly and professionally. A poorly situated refrigerator water line, originally improperly installed by a previous plumber, was re-routed correctly and in time for our painter to patch and paint the area. Other work included a check & tune-up of the Heating System, a review/check-up of the A/C System, and a handful of other minor plumbing issues rounded out the laundry list of items. A huge amount of work was done swiftly and efficiently in a couple of days. It cannot be emphasized enough...James was fantastic. His approach to the work we wanted done was beyond any experience we have ever had with any service professional. His advice was practical; he advised work that he would want as if it was his home being worked on. His work ethic was customer-focused and clearly above and beyond: "How late is too late for me to work this evening? I would like to finish as much as possible but want to make sure it doesn't impact you." James is all that and more...he is THE definition of the Yiddish word "Mensch" : a person of integrity and honor. We will definitely work again with James at Precision Plumbing & Heating."
Response time8 hrs
Recommended by100%of homeowners
Avatar for BERARDI ELECTRICAL CONTRACTING, INC.
BERARDI ELECTRICAL CONTRACTING, INC.
3.7(
72
)
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"Leo and his crew were true professionals. Excellent service and true attention to detail. Not only was the project done promptly and correctly, but it was a thing of beauty as well. I highly recommend Barardi Electrical."
Lido beach NY
Lido beach NY
Lido beach NY
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
HomeServe of Long Island
2.5(
1
)
Tankless Water Heater - Repair

Serving Greenlawn, 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

1-800-Plumber +Air of Central Long Island
New to Angi
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

1800-Plumber +Air is located in Central Long Island, NY and is focused on being the BEST! It’s not about being better than everyone else, instead our focus is on providing you with the fast, dependable plumbing and emergency services when you need it most. Our goal is to give you the BEST experience you have ever received from a service based business.

1 neighbors recently requested a quote
Avatar for Herber Plumbing & Heating Corp.
Herber Plumbing & Heating Corp.
4.6(
214
)
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

In business since 1971

Free estimates

Emergency services offered

"Great. They showed up on time Wednesday morning; done and gone before noon. Both the water heater and the garbage disposal work really well; they took the old stuff away. Work was professional."
Response time12 hrs
Recommended by89%of homeowners
Avatar for Speedy Water Heaters
Speedy Water Heaters
5.0(
10
)
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

Credit card accepted

"The gentleman that came out was very knowledgeable. He showed me things about my water heater that I never knew. He was honest & extremely polite. The company was a pleasure to do business with."
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+13

Recommended by100%of homeowners
Avatar for APV Mechanical Inc
APV Mechanical Inc
4.8(
89
)
Tankless Water Heater - Repair

Serving Greenlawn, NY and surrounding areas

In business since 2005

Free estimates

Credit card accepted

",ther plumber
Upon my initial call to APV Mechanical I received a call back within 10 minutes from Tony the owner. I explained that I didn't have any hot water at all. Tony understood the situation immediately and said he could come by the same day within a few hours. This blew me away bc I had called someone with whom I had done business with in the recent past who quoted me a price that was astronomical and wasn't sure when he could get to it. I also called a plumber that I didn't know who said they wouldn't be able to come out to even look at the job for 2 days and that a quotation and "service call" would be $99.00 and that "maybe", if I had the work done, I would receive a credit for the $99.00 fee off of the final bill. I said thanks but no thanks, I'll take my chances with someone else. Then I called APV, never heard of them and never did business with them before, just got them off of Angies list. WOW, what a find!!. Tony and his assistant came when they said, couldn't be nicer or more personable. They were in and out within two hours and price was fair and exactly what he quoted over the phone. They worked neatly and professionally. When everything was finished they stayed and tested the system. There was a minor snag but they stayed until it was right and worked properly.
Tony knows his business, is proud of it and was very appreciative of the work. I would not hesitate one second to recommend  them for this type of work. If you live in this area, use them because you will get a fair price and top quality work.
I have used Angies List a few times now over the past several years and have generally had great results. Unfortunately the other vendors also had good ratings on Angies list but  turned out to be just awful. I will definitely call APV the next time I need heating or cooling work.
APV is the real deal and you won't be disappointed.
"
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+2

Recommended by91%of homeowners
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