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Tankless water heater repair pros in Bay Shore

Avatar for Mr. Big Plumbing & Heating
Mr. Big Plumbing & Heating
38 Brefni Street
4.88(
13
)
Approved Pro
Mr. Big Plumbing & Heating
38 Brefni Street
4.88(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
3 years of experience

Big Plumbing and Heating, Inc., is your local contractor with over 20 years experience in taking care of all your needs. We do installs and service work for Suffolk and Nassau Counties. Call Today!

"Andre is very knowledgeable about the job. He not only fix the problem but also advise the necessary preventative action."

Victor P on April 2024

Big Plumbing and Heating, Inc., is your local contractor with over 20 years experience in taking care of all your needs. We do installs and service work for Suffolk and Nassau Counties. Call Today!

"Andre is very knowledgeable about the job. He not only fix the problem but also advise the necessary preventative action."

Victor P on April 2024


Avatar for Energywise, Inc.
Energywise, Inc.
2231 5th Avenue
New on HomeAdvisorNew on Angi
Approved Pro
Energywise, Inc.
2231 5th Avenue
New on AngiNew on HomeAdvisor
Approved Pro
40 years of experience
Emergency services 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.

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.


Avatar for HEATWAVE PLUMBING & HEATING LLC
HEATWAVE PLUMBING & HEATING LLC
109-14 139TH STREET
4.85(
20
)
Approved Pro
HEATWAVE PLUMBING & HEATING LLC
109-14 139TH STREET
4.85(
20
)
Approved Pro
Customers say: Quick response
17 local quotes requested
1 years of experience

HEATWAVE PLUMBING & HEATING LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Exceptional work done !! They finished in timely Manner and for a great price 10 out of 10 definitely recommend"

rose S on May 2025

HEATWAVE PLUMBING & HEATING LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Exceptional work done !! They finished in timely Manner and for a great price 10 out of 10 definitely recommend"

rose S on May 2025


Avatar for Varsity Home Service Company, Inc.
Varsity Home Service Company, Inc.
1610 Ocean Avenue
4.78(
186
)
Approved Pro
Varsity Home Service Company, Inc.
1610 Ocean Avenue
4.78(
186
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
420 local quotes requested

Practice makes perfect, and Varsity has been at it for over half a century! What began with a Navy veteran’s simple dream — to teach the value of honest, hands-on work to his children — has grown into one of Long Island’s most trusted resource for plumbing, heating and air conditioning services. Varsity’s mission has always been clear: to serve our neighbors with integrity, solve home service challenges with innovative solutions, and provide lasting results. Our dedicated crew is background-checked, rigorously trained in the latest technology, and excited to exceed your expectations. Above all Varsity is here to EARN your trust—not just for today, but for years to come. Let’s tackle your home service needs with the quality and care you deserve!

"Prompt and professional. Thanks."

Justin S on May 2025

Practice makes perfect, and Varsity has been at it for over half a century! What began with a Navy veteran’s simple dream — to teach the value of honest, hands-on work to his children — has grown into one of Long Island’s most trusted resource for plumbing, heating and air conditioning services. Varsity’s mission has always been clear: to serve our neighbors with integrity, solve home service challenges with innovative solutions, and provide lasting results. Our dedicated crew is background-checked, rigorously trained in the latest technology, and excited to exceed your expectations. Above all Varsity is here to EARN your trust—not just for today, but for years to come. Let’s tackle your home service needs with the quality and care you deserve!

"Prompt and professional. Thanks."

Justin S on May 2025


Avatar for Tedco Group, Inc.
Tedco Group, Inc.
140 North 9th Street
4.54(
323
)
Approved Pro
Tedco Group, Inc.
140 North 9th Street
4.54(
323
)
Approved Pro
Customers say: Quality work
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
15 years of experience

We are dedicated to providing our clients with the very best in service, installation, and repair for your heating and cooling needs. We are a locally owned and operated company that values honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results and look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Fantastic service. Job was completed quickly, and staff was clean."

Panagiotis S on May 2025

We are dedicated to providing our clients with the very best in service, installation, and repair for your heating and cooling needs. We are a locally owned and operated company that values honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results and look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Fantastic service. Job was completed quickly, and staff was clean."

Panagiotis S on May 2025


Avatar for JNM Sewer
JNM Sewer
36 1st Ave
5.00(
27
)
Approved Pro
JNM Sewer
36 1st Ave
5.00(
27
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
122 local quotes requested

Here at JNM Sewer & Drain we know how difficult it can be to experience plumbing problems. We’re a family owned and operated company that wants to take on your challenges efficiently, quickly, and at the lowest cost possible. We won’t tell you we can’t help you over the phone. Instead we’ll discuss, provide estimated costs over the phone, and if we need more information, you can even send a text message with a photo of your issue. We don’t pretend to specialize in various industries. Instead we focus on one thing and do it well: sewer and drain cleaning. We offer solutions for homeowners, plumbers, and small business owners. WHY ELSE SHOULD YOU CONSIDER US? We offer warranties. We’ve got the equipment on-hand to tackle your challenges. We offer maintenance programs (monthly or yearly options available). We’re great communicators so we make sure you understand the issue and how we’re going to solve it before we take it on. We charge on a job basis, not hourly. No hidden fees. AREAS WE SERVE We cater to homes and businesses located in Nassau County, Suffolk County, Queens, Brooklyn, and the Bronx.

"I had a great experience with Justin. On time, professional, and quickly diagnosed and fixed the issue. The work was done neatly and everything’s been working perfectly since. Fair pricing and great communication throughout. Highly recommend."

Francesco F on May 2025

Here at JNM Sewer & Drain we know how difficult it can be to experience plumbing problems. We’re a family owned and operated company that wants to take on your challenges efficiently, quickly, and at the lowest cost possible. We won’t tell you we can’t help you over the phone. Instead we’ll discuss, provide estimated costs over the phone, and if we need more information, you can even send a text message with a photo of your issue. We don’t pretend to specialize in various industries. Instead we focus on one thing and do it well: sewer and drain cleaning. We offer solutions for homeowners, plumbers, and small business owners. WHY ELSE SHOULD YOU CONSIDER US? We offer warranties. We’ve got the equipment on-hand to tackle your challenges. We offer maintenance programs (monthly or yearly options available). We’re great communicators so we make sure you understand the issue and how we’re going to solve it before we take it on. We charge on a job basis, not hourly. No hidden fees. AREAS WE SERVE We cater to homes and businesses located in Nassau County, Suffolk County, Queens, Brooklyn, and the Bronx.

"I had a great experience with Justin. On time, professional, and quickly diagnosed and fixed the issue. The work was done neatly and everything’s been working perfectly since. Fair pricing and great communication throughout. Highly recommend."

Francesco F on May 2025


Avatar for Classic Remodeling Group Inc
Classic Remodeling Group Inc
1839 Bellmore Ave
4.79(
43
)
Approved Pro
Classic Remodeling Group Inc
1839 Bellmore Ave
4.79(
43
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
2386 local quotes requested

Full service remodeling, roofing and siding contractors serving Long Island. Whether you are in need of new roof installation, roof restoration, or roof repairs; new siding installation, siding repairs; new windows & doors installation; kitchen remodeling; bathroom remodeling; we are the Long Island home remodeling contractors to call, due to our professionalism and affordability.

"John and his crew did a fabulous job renovating my bathroom. It was done in a timely manner and they were extremely neat and cleaned up very well after themselves. I would definitely hire them again!"

Denise S on March 2025

Full service remodeling, roofing and siding contractors serving Long Island. Whether you are in need of new roof installation, roof restoration, or roof repairs; new siding installation, siding repairs; new windows & doors installation; kitchen remodeling; bathroom remodeling; we are the Long Island home remodeling contractors to call, due to our professionalism and affordability.

"John and his crew did a fabulous job renovating my bathroom. It was done in a timely manner and they were extremely neat and cleaned up very well after themselves. I would definitely hire them again!"

Denise S on March 2025


Avatar for BuildRite Pro Inc.
BuildRite Pro Inc.
Suffolk County
4.11(
19
)
Approved Pro
BuildRite Pro Inc.
Suffolk County
4.11(
19
)
Approved Pro
1431 local quotes requested
Free onsite estimate

Here at Bawa Construction Group, we sustain our business on quality and integrity. We are experts in general contracting specializing in all types of remodeling, Concrete work, Hardscaping/Pavers, Kitchen/Bath/ and Basements. We are committed to providing quality services from the beginning to the end of your project or scope of work. We look forward to earning your business. We also offer financing options to all customers dealing with 30+ banks and lenders. Book your FREE ESTIMATE today!!!

"Had a bad experience with this company. Dealt with Harry for the contract and 50% down payment and then was told Joe was doing my project. Oh Joe oh Joe. You can’t make this guy up. The worst case of a pathological liar I’ve ever seen. On the promised day of work nobody would show up. He used every excuse in the book, after about 7 no shows and excuses from worker called out, there is rain in forecast (drizzle at best), the Canadian wild fires, Flu, each time he would sound so genuine, but once the common excuses ran out he would say “I’m coming right now, I’m loading up the bricks in the car as we speak [goes on to tell another worker to load some more bricks in the other truck while I’m on the phone], I cancel my plans and wait… no show. This goes on and on. Then he dumps a pile a of sand on my driveway and that sits for 2 more weeks. Everytime I would call Harry, he would apologize and say I will call him. Was convinced I was scammed with the upfront payment. Threatened to call police on the company. After about 6 weeks past promised day, the work was not very good either. The contract stated polymeric sand would be used to lock pavers. They did not. When I called and showed them pictures they said “oh Joe must have been running low on the polymeric sand, I’ll have him come by tomorrow first thing in the morning and fix that”. I laughed to myself, these guys barely showed up with 50% of payment still with me. How are they showing up after getting paid full. I ended up hiring another company and they locked the pavers and finished the job. If you are not in a rush and don’t care too much about getting the whole work done and good quality, then you can give these guys a try, otherwise don’t be an idiot like me and go read other Yelp reviews."

A A on August 2023

Here at Bawa Construction Group, we sustain our business on quality and integrity. We are experts in general contracting specializing in all types of remodeling, Concrete work, Hardscaping/Pavers, Kitchen/Bath/ and Basements. We are committed to providing quality services from the beginning to the end of your project or scope of work. We look forward to earning your business. We also offer financing options to all customers dealing with 30+ banks and lenders. Book your FREE ESTIMATE today!!!

"Had a bad experience with this company. Dealt with Harry for the contract and 50% down payment and then was told Joe was doing my project. Oh Joe oh Joe. You can’t make this guy up. The worst case of a pathological liar I’ve ever seen. On the promised day of work nobody would show up. He used every excuse in the book, after about 7 no shows and excuses from worker called out, there is rain in forecast (drizzle at best), the Canadian wild fires, Flu, each time he would sound so genuine, but once the common excuses ran out he would say “I’m coming right now, I’m loading up the bricks in the car as we speak [goes on to tell another worker to load some more bricks in the other truck while I’m on the phone], I cancel my plans and wait… no show. This goes on and on. Then he dumps a pile a of sand on my driveway and that sits for 2 more weeks. Everytime I would call Harry, he would apologize and say I will call him. Was convinced I was scammed with the upfront payment. Threatened to call police on the company. After about 6 weeks past promised day, the work was not very good either. The contract stated polymeric sand would be used to lock pavers. They did not. When I called and showed them pictures they said “oh Joe must have been running low on the polymeric sand, I’ll have him come by tomorrow first thing in the morning and fix that”. I laughed to myself, these guys barely showed up with 50% of payment still with me. How are they showing up after getting paid full. I ended up hiring another company and they locked the pavers and finished the job. If you are not in a rush and don’t care too much about getting the whole work done and good quality, then you can give these guys a try, otherwise don’t be an idiot like me and go read other Yelp reviews."

A A on August 2023


Top Gun Kitchen & Cabinets
5.00(
11
)
Approved Pro
Top Gun Kitchen & Cabinets
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
589 local quotes requested

Full service Kitchen Remodeling company. Specializing in cabinet painting and kitchen face lifts with over 25 years experience. Free consultations. ZERO pressure sales. Let us save you thousands. Call today.

"The work went very well Robert was pleasant, easy to to talk to and very skilled!. He repaired and touched up cabinet doors. They matched perfectly. He is vey dependable. I highly recommend him. I was really thrilled with the work he did!"

Alice C on April 2025

Full service Kitchen Remodeling company. Specializing in cabinet painting and kitchen face lifts with over 25 years experience. Free consultations. ZERO pressure sales. Let us save you thousands. Call today.

"The work went very well Robert was pleasant, easy to to talk to and very skilled!. He repaired and touched up cabinet doors. They matched perfectly. He is vey dependable. I highly recommend him. I was really thrilled with the work he did!"

Alice C on April 2025


Avatar for JBL HOME IMPROVEMENTS INC
JBL HOME IMPROVEMENTS INC
PO BOX 584
4.67(
255
)
Approved Pro
JBL HOME IMPROVEMENTS INC
PO BOX 584
4.67(
255
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
2039 local quotes requested

JBL Home Improvements, Inc, located in St. James, is a family owned and operated remodeling business specializing in residential projects. Owner & Contractor David Kaplan, General Manager Jill Kaplan, along with their team of talented professionals, are dedicated to providing outstanding workmanship and customer service to homeowners who live in their community.

"JBL Home Improvements is a great company to work with. Dave and Jill are friendly, helpful, reliable and punctual! When they stay they will start, the do. They are there early each day and keep things as tidy as possible. For our recent job they finished just 1 day past the expected time-frame. Considering the many stories you probably have heard - the timing was spot on! They have great resources and talented workers who did an excellent job installing new floors and a new set of stairs, as well as new doors, sheet rock and molding! Highly recommend using JBL Home Improvements!"

Jeff G on March 2025

JBL Home Improvements, Inc, located in St. James, is a family owned and operated remodeling business specializing in residential projects. Owner & Contractor David Kaplan, General Manager Jill Kaplan, along with their team of talented professionals, are dedicated to providing outstanding workmanship and customer service to homeowners who live in their community.

"JBL Home Improvements is a great company to work with. Dave and Jill are friendly, helpful, reliable and punctual! When they stay they will start, the do. They are there early each day and keep things as tidy as possible. For our recent job they finished just 1 day past the expected time-frame. Considering the many stories you probably have heard - the timing was spot on! They have great resources and talented workers who did an excellent job installing new floors and a new set of stairs, as well as new doors, sheet rock and molding! Highly recommend using JBL Home Improvements!"

Jeff G on March 2025

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Tankless water heater installations FAQs

Professional flushing services for tankless water heaters run about $200 per visit. This essential maintenance procedure eliminates mineral deposits from critical components, particularly the heat exchanger. While homeowners can purchase DIY flushing kits for $50 to $100, professional service offers the advantage of thorough cleaning with proper techniques. Professional maintenance also includes inspection of additional components that might need attention.

Industry experts and manufacturers recommend annual maintenance for tankless water heaters, with more frequent service (every six months) for homes with challenging water conditions. This regular attention prevents efficiency losses and extends the unit's operational lifespan. Watch for warning signs like reduced water temperature, inconsistent performance, or system error codes that might indicate maintenance is needed sooner than scheduled.

Neglecting regular maintenance allows mineral scale to accumulate within your system, restricting water flow and reducing heating efficiency. This forces your unit to work harder, consuming more energy while delivering less satisfactory performance. Over time, this strain can lead to component failures, inconsistent water temperatures, and premature system replacement. Additionally, most manufacturers require documentation of regular maintenance to honor warranty coverage for major components.

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