Top-rated water heater repair or service pros.

Get matched with top water heater repair or service pros in Oyster Bay, 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.

Find Water heater repair or service pros in Oyster Bay

DPH, Inc

5.00(
1
)
Approved Pro

DPH, Inc

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

Company, 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. I do charge trip fee depending where location is at , can discuss b4 service.

"They are dedicated , timely and professional. They provided quality work."

Nicola R on August 2021

Company, 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. I do charge trip fee depending where location is at , can discuss b4 service.

"They are dedicated , timely and professional. They provided quality work."

Nicola R on August 2021


Avatar for WD Builders, Inc.

WD Builders, Inc.

5.00(
12
)
Approved Pro

WD Builders, Inc.

5.00(
12
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
31 years of experience

At WD Builders Inc., we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"Marvin came out to give us an estimate for a damaged leaking roof. We hired him to do the repair and install a new roof and skylights. We were extremely pleased with his service and we are happy the roof is not leaking anymore! We plan to have him come and do more work on the interior of the house soon to fix the damage from all the rainwater that came in."

Evangeline R on July 2023

At WD Builders Inc., we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

"Marvin came out to give us an estimate for a damaged leaking roof. We hired him to do the repair and install a new roof and skylights. We were extremely pleased with his service and we are happy the roof is not leaking anymore! We plan to have him come and do more work on the interior of the house soon to fix the damage from all the rainwater that came in."

Evangeline R on July 2023


C&A Mechanical

4.77(
69
)
Approved Pro

C&A Mechanical

4.77(
69
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
29 years of experience

Here at C&A Mechanical, we have more than 30 years of heating and air conditioning experience. We provide quality work and continue our education and knowledge about the industry. Give us a call.

"As a senior citizen I have dealt with many contractors/tradespeople in my lifetime and a few of them have disappointed me but overall have been satisfied and then there are a few in my "TOP 10 LIST" who were EXCEPTIONAL & OUTSTANDING which is rare these days. So, Craig at C&A Mechanical and his team are indeed EXCEPTIONAL!!! Craig the owner personally came to my home to review the damage caused by a faulty tank as I had no heat or hot water and promised it would be fixed the next day! As promised his team member Alex was promptly at my home the very next morning! Also, his quote was "Fair & Reasonable" and at the end of the job it was LESS $$$ then the quote because it required less time than estimated. NOBODY does that these days! So I HIGHLY recommend C & A Mechanical for your HVAC needs! Bobby A"

bobby A on October 2025

Here at C&A Mechanical, we have more than 30 years of heating and air conditioning experience. We provide quality work and continue our education and knowledge about the industry. Give us a call.

"As a senior citizen I have dealt with many contractors/tradespeople in my lifetime and a few of them have disappointed me but overall have been satisfied and then there are a few in my "TOP 10 LIST" who were EXCEPTIONAL & OUTSTANDING which is rare these days. So, Craig at C&A Mechanical and his team are indeed EXCEPTIONAL!!! Craig the owner personally came to my home to review the damage caused by a faulty tank as I had no heat or hot water and promised it would be fixed the next day! As promised his team member Alex was promptly at my home the very next morning! Also, his quote was "Fair & Reasonable" and at the end of the job it was LESS $$$ then the quote because it required less time than estimated. NOBODY does that these days! So I HIGHLY recommend C & A Mechanical for your HVAC needs! Bobby A"

bobby A on October 2025


Avatar for ANQOR PLUMBING & HEATING INC.

ANQOR PLUMBING & HEATING INC.

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

ANQOR PLUMBING & HEATING INC.

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
4 years of experience
Free onsite estimate

At ANQOR PLUMBING & HEATING INC. we pride our ourselves in quality, value, and service! We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business! When you contact us, you'll be given the exceptional customer service you deserve, including free quotes, up-front pricing, and no hidden fees. These benefits are provided to our clients in order to show that our company genuinely cares about customer satisfaction. Give us a call today to schedule your free estimate!

At ANQOR PLUMBING & HEATING INC. we pride our ourselves in quality, value, and service! We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business! When you contact us, you'll be given the exceptional customer service you deserve, including free quotes, up-front pricing, and no hidden fees. These benefits are provided to our clients in order to show that our company genuinely cares about customer satisfaction. Give us a call today to schedule your free estimate!


Avatar for Islandwide Plumbing and Heating, LLC

Islandwide Plumbing and Heating, LLC

5.00(
1
)
Approved Pro

Islandwide Plumbing and Heating, LLC

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
18 years of experience

At Islandwide Plumbing and Heating LLC I pride my company on reliability, great communication, integrity, and quality work. I am an expert in my trade and will do my best to keep you as educated as I can on your particular task or project. I look forward to earning your business!

"He is an awesome guy to work with! I would highly recommend him!"

Todd Y on August 2020

At Islandwide Plumbing and Heating LLC I pride my company on reliability, great communication, integrity, and quality work. I am an expert in my trade and will do my best to keep you as educated as I can on your particular task or project. I look forward to earning your business!

"He is an awesome guy to work with! I would highly recommend him!"

Todd Y on August 2020


Tonnage Heating & Cooling

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Tonnage Heating & Cooling

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
17 years of experience
Free onsite estimate

Tonnage Heating & Cooling 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.

Tonnage Heating & Cooling 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.


"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


"Service Professional was very open and honest about his work and willing to work with the customer."

Reginald M on February 2022

please call us with all your plumbing and hvac needs or repairs. We are a service company and we will guarantee our service to your home. Please call

"Service Professional was very open and honest about his work and willing to work with the customer."

Reginald M on February 2022


Avatar for Excellent Plumbing & Heating

Excellent Plumbing & Heating

5.00(
13
)
Approved Pro

Excellent Plumbing & Heating

5.00(
13
)
Approved Pro
Customers say: Quick response
5 years of experience
Free onsite estimate

Excellent Plumbing & Heating 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.

"The team did an excellent job. I converted my heating system from oil to gas. They finished everything quickly and efficiently. Joe and his crew were very easy to communicate with. I highly recommend them for any future plumbing jobs. "

Lanilo E on January 2026

Excellent Plumbing & Heating 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.

"The team did an excellent job. I converted my heating system from oil to gas. They finished everything quickly and efficiently. Joe and his crew were very easy to communicate with. I highly recommend them for any future plumbing jobs. "

Lanilo E on January 2026


Avatar for Varsity Home Service Company, Inc.

Varsity Home Service Company, Inc.

4.79(
196
)
Approved Pro

Varsity Home Service Company, Inc.

4.79(
196
)
Approved Pro
Customers say: Quality work
192 local quotes requested
64 years of experience

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!

"We had an emergency after a power surge that fried our furnace. Varsity was at our home first thing in the morning. Ralph went through a thorough diagnostic process with us, went over all of our options with prices, and we ultimately replaced our entire unit. The work was done efficiently within hours. No mess to clean up afterwards, and the techs at Varsity returned our home to the safe, warm environment we needed in preparation for a large winter storm. The techs took proper precautions when entering our home, even going so far as to wearing shoe coverings to protect our floors. The service manager communicated the entire process with us before it was happening, keeping us informed every step of the way. The employees at Varsity treated our family like their family. They made our urgency their priority. Every employee we spoke with was kind, respectful, and thoroughly educated on the situation, even the customer service representatives."

Katherine M on January 2026

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!

"We had an emergency after a power surge that fried our furnace. Varsity was at our home first thing in the morning. Ralph went through a thorough diagnostic process with us, went over all of our options with prices, and we ultimately replaced our entire unit. The work was done efficiently within hours. No mess to clean up afterwards, and the techs at Varsity returned our home to the safe, warm environment we needed in preparation for a large winter storm. The techs took proper precautions when entering our home, even going so far as to wearing shoe coverings to protect our floors. The service manager communicated the entire process with us before it was happening, keeping us informed every step of the way. The employees at Varsity treated our family like their family. They made our urgency their priority. Every employee we spoke with was kind, respectful, and thoroughly educated on the situation, even the customer service representatives."

Katherine M on January 2026

...
Showing 1-10 of 1037
FAQs for water heater repair or service projects in Oyster Bay, NY

Warning signs include fluctuating water temperatures, a pilot light that repeatedly goes out, unusual noises from the tank, or complete heating failure. You might also detect a rotten egg smell, indicating a potential gas leak, or notice water that never reaches the proper temperature. If your water heater is over eight years old and displaying these symptoms, the gas valve is a likely culprit. Professional inspection is recommended, especially if gas odors are present.

Water heater gas valves are not universally interchangeable. Each valve must match your specific water heater's make, model, and specifications. Important compatibility factors include gas type (natural gas vs. propane), BTU rating, connection types, and physical dimensions. Using an incorrect valve can result in poor performance, premature failure, or dangerous gas leaks. Always consult your water heater's documentation or a professional plumber to identify the appropriate replacement valve for your unit.

The Oyster Bay, NY homeowners’ guide to water heater repair or services

From average costs to expert advice, get all the answers you need to get your job done.