Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in your area

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.

Tankless water heater repair pros in South Windsor

American Air Mechanical, LLC
23 Standish Drive
4.76(
101
)
Approved Pro
American Air Mechanical, LLC
23 Standish Drive
4.76(
101
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
21 years of experience

American Air Mechanical, LLC, is Connecticut's premier HVAC company. Our professionalism and attention to detail set us apart from the rest. Call us today!

"Our split unit air conditioner was under performing. Paul performed a thorough inspection of the system. During the process he used his experience and state of the art testing equipment. He kept us informed of his findings and also explained how to consider solutions. The issue turned out to be a build of of pollen and dust deep inside the wall unit. He opened it up and removed every component carefully cleaning each surface and crevice. Paul is very personable and considerate. He took precautions to protect our wall and flooring. He was also attentive to the integrity of all the parts he cleaned. Now the air conditioner is as clean as a new unit. It is efficient, quiet and we are cool again. Thank you, Paul"

Daniel R on July 2024

American Air Mechanical, LLC, is Connecticut's premier HVAC company. Our professionalism and attention to detail set us apart from the rest. Call us today!

"Our split unit air conditioner was under performing. Paul performed a thorough inspection of the system. During the process he used his experience and state of the art testing equipment. He kept us informed of his findings and also explained how to consider solutions. The issue turned out to be a build of of pollen and dust deep inside the wall unit. He opened it up and removed every component carefully cleaning each surface and crevice. Paul is very personable and considerate. He took precautions to protect our wall and flooring. He was also attentive to the integrity of all the parts he cleaned. Now the air conditioner is as clean as a new unit. It is efficient, quiet and we are cool again. Thank you, Paul"

Daniel R on July 2024


Avatar for E and R Mechanical
E and R Mechanical
410 W River St
4.73(
238
)
Approved Pro
E and R Mechanical
410 W River St
4.73(
238
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
83 local quotes requested

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big, or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business.

"They were very professional, punctual, and overall great!"

julius f on May 2025

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects, no matter how big, or small. We are experts in our trade, and will always keep you educated on your particular task or project. We look forward to earning your business.

"They were very professional, punctual, and overall great!"

julius f on May 2025


Avatar for Tandem Mechanical
Tandem Mechanical
21 Mainline Drive
5.00(
32
)
Approved Pro
Tandem Mechanical
21 Mainline Drive
5.00(
32
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
34 local quotes requested

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction! We also provide plumbing, Hvac, and drain cleaning services through out MA, CT, and VT

"Josh and his crew are amazing. Far exceeded all of my expectations. Very responsive from day one and communicated well every aspect of my project every step of the way through completion. Highly recommend Tandem Mechanical this is hands down the best company Ive ever hired."

Brayton W on January 2022

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our major focus is on the quality our work and producing outstanding results. We are committed to creating a level of value unmatched by any of our competitors. We look forward to building lasting relationships with our clients and guarantee your satisfaction! We also provide plumbing, Hvac, and drain cleaning services through out MA, CT, and VT

"Josh and his crew are amazing. Far exceeded all of my expectations. Very responsive from day one and communicated well every aspect of my project every step of the way through completion. Highly recommend Tandem Mechanical this is hands down the best company Ive ever hired."

Brayton W on January 2022


Avatar for Ray Page Plumbing, Inc.
Ray Page Plumbing, Inc.
400 Talcottville Rd #5R
4.89(
67
)
Approved Pro
Ray Page Plumbing, Inc.
400 Talcottville Rd #5R
4.89(
67
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
38 local quotes requested

With over 25 years of experience in the home improvement industry, we are the experts you need to take care of your home or business. We handle everything from water heater installations to drain cleaning to well pumps and water treatment. We will treat your home as we would treat our own. Give Ray Page Plumbing, Inc. a call today we look forward to working with you!

"Na"

Josie D on June 2024

With over 25 years of experience in the home improvement industry, we are the experts you need to take care of your home or business. We handle everything from water heater installations to drain cleaning to well pumps and water treatment. We will treat your home as we would treat our own. Give Ray Page Plumbing, Inc. a call today we look forward to working with you!

"Na"

Josie D on June 2024


Avatar for Connecticut Custom Creations
Connecticut Custom Creations
260 Hartford Avenue
4.82(
22
)
Approved Pro
Connecticut Custom Creations
260 Hartford Avenue
4.82(
22
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
1062 local quotes requested

At Connecticut Custom Creations™, we specialize in transforming kitchens, bathrooms, basements, and attics into beautiful, functional spaces tailored to your needs. We take great pride in helping people build their dream homes, a core value that drives everything we do. As an owner-operated business with over a decade of experience, I bring seasoned expertise to every project, no matter the size. Whether it’s a small renovation or a large-scale remodel, we’re committed to delivering exceptional results with care and precision.

"I'm amazed of how my shower upgrade turned out. I still can't believe cts creation finished in one day. I recommend cts creation to anybody and everybody. They killed it!"

Zach t on August 2024

At Connecticut Custom Creations™, we specialize in transforming kitchens, bathrooms, basements, and attics into beautiful, functional spaces tailored to your needs. We take great pride in helping people build their dream homes, a core value that drives everything we do. As an owner-operated business with over a decade of experience, I bring seasoned expertise to every project, no matter the size. Whether it’s a small renovation or a large-scale remodel, we’re committed to delivering exceptional results with care and precision.

"I'm amazed of how my shower upgrade turned out. I still can't believe cts creation finished in one day. I recommend cts creation to anybody and everybody. They killed it!"

Zach t on August 2024


Avatar for Long Home Products
Long Home Products
16 International Dr
5.00(
1
)
Approved Pro
Long Home Products
16 International Dr
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2799 local quotes requested

With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Quick, one day service, cleaned up after, friendly they even double checked with us before installing safety handles and shelves to make sure they were exactly where we wanted them."

Shelley A on March 2025

With over 70 years of experience in home improvement, Long Home Products is the industry-leading company you can trust to give you peace of mind. We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We are experts in all aspects of roofing, bathroom, window and door projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"Quick, one day service, cleaned up after, friendly they even double checked with us before installing safety handles and shelves to make sure they were exactly where we wanted them."

Shelley A on March 2025


Avatar for Drain Defense
Drain Defense
19 East Street
4.14(
14
)
Approved Pro
Drain Defense
19 East Street
4.14(
14
)
Approved Pro
Super Service Award
Customers say: Super punctual
128 local quotes requested
1 years of experience

We focus on all kinds of drainage blockage and drain cleaning! We can do anywhere from 1-1/2” line to 10” line. We also can do water jetting, grease issues, smaller drain cleaning (like for slow drain sinks, toilets, floor drains, etc), camera pipe inspections, underground pipe locating, and more! We offer a diverse range of services tailored to meet the unique needs of every customer. We take a personalized approach to each project. We work closely with our clients to understand their vision, preferences, and budgetary requirements. We strive to exceed expectations by delivering exceptional service, great quality work, and professionalism on every job. Read more below on all the services we offer and contact us with any questions or to schedule a free estimate today!

"Fast, friendly service. They went the extra mile from the original job and fixed out basement sink. Thanks!"

Rob C on March 2025

We focus on all kinds of drainage blockage and drain cleaning! We can do anywhere from 1-1/2” line to 10” line. We also can do water jetting, grease issues, smaller drain cleaning (like for slow drain sinks, toilets, floor drains, etc), camera pipe inspections, underground pipe locating, and more! We offer a diverse range of services tailored to meet the unique needs of every customer. We take a personalized approach to each project. We work closely with our clients to understand their vision, preferences, and budgetary requirements. We strive to exceed expectations by delivering exceptional service, great quality work, and professionalism on every job. Read more below on all the services we offer and contact us with any questions or to schedule a free estimate today!

"Fast, friendly service. They went the extra mile from the original job and fixed out basement sink. Thanks!"

Rob C on March 2025


Avatar for Distinctive Home Improvement
Distinctive Home Improvement
4.56(
9
)
Approved Pro
Distinctive Home Improvement
4.56(
9
)
Approved Pro
Customers say: Quality work
231 local quotes requested
22 years of experience

Hi, my name is Todd. I developed a love for remodeling homes from the time I started helping my dad when I was a kid. He's also a contractor and taught me everything I know. And now, I have over 30 years experience in all phases of remodeling including electrical and plumbing. There's not much we don't do. Absolutely love my job ! Please feel free to reach out anytime at 860 856-0413. We pride ourselves on the quality work we provide (attention to detail is incredibly important to me), while delivering great customer service. We are licensed and insured, and please feen free to reach out for as many referrals as you'd like. Please see the services we offer below and call -or- click to schedule an estimate today. We also do DECKS, PATIOS, WINDOWS, HARDWOOD, VINYL PLANK, and TILE FLOORS, DRYWALL, PAINTING, CUSTOM TRIMWORK, ROOFING, SIDING, AND of course FULL KITCHENS and BATHROOMS. Also, I'm very accessible and respond promptly. Thank you so much ! Todd

"Todd and his team did an outstanding job remodeling our kitchen! From start to finish, they were professional, efficient, and truly attentive to our needs. The final result is a perfect blend of style and functionality, transforming our kitchen into a space we now love to spend time in. Todd's expertise and attention to detail were evident throughout the process, and the team worked seamlessly to bring our vision to life. We couldn’t be happier with the outcome and would highly recommend them to anyone looking for a top-notch kitchen remodel!"

Michael L on March 2025

Hi, my name is Todd. I developed a love for remodeling homes from the time I started helping my dad when I was a kid. He's also a contractor and taught me everything I know. And now, I have over 30 years experience in all phases of remodeling including electrical and plumbing. There's not much we don't do. Absolutely love my job ! Please feel free to reach out anytime at 860 856-0413. We pride ourselves on the quality work we provide (attention to detail is incredibly important to me), while delivering great customer service. We are licensed and insured, and please feen free to reach out for as many referrals as you'd like. Please see the services we offer below and call -or- click to schedule an estimate today. We also do DECKS, PATIOS, WINDOWS, HARDWOOD, VINYL PLANK, and TILE FLOORS, DRYWALL, PAINTING, CUSTOM TRIMWORK, ROOFING, SIDING, AND of course FULL KITCHENS and BATHROOMS. Also, I'm very accessible and respond promptly. Thank you so much ! Todd

"Todd and his team did an outstanding job remodeling our kitchen! From start to finish, they were professional, efficient, and truly attentive to our needs. The final result is a perfect blend of style and functionality, transforming our kitchen into a space we now love to spend time in. Todd's expertise and attention to detail were evident throughout the process, and the team worked seamlessly to bring our vision to life. We couldn’t be happier with the outcome and would highly recommend them to anyone looking for a top-notch kitchen remodel!"

Michael L on March 2025


Avatar for  Elite Remodeling Services LLC
Elite Remodeling Services LLC
29 Deerfield Lane
5.00(
5
)
Approved Pro
Elite Remodeling Services LLC
29 Deerfield Lane
5.00(
5
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1970 local quotes requested

10 years worth of construction experience in various industries.

"Mike and his crew were wonderful, knowledgable, professional and efficient. The quality of the work was outstanding and the whole process was smooth and easy! Can’t recommend them highly enough!"

Brianna P on November 2024

10 years worth of construction experience in various industries.

"Mike and his crew were wonderful, knowledgable, professional and efficient. The quality of the work was outstanding and the whole process was smooth and easy! Can’t recommend them highly enough!"

Brianna P on November 2024


Avatar for Advanced Sewer & Drain Inc
Advanced Sewer & Drain Inc
493 Fuller St
4.86(
49
)
Approved Pro
Advanced Sewer & Drain Inc
493 Fuller St
4.86(
49
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
79 local quotes requested

Full service drain cleaning company with only highly experienced technicians.24 hour service at 1 fair rate.Satisfaction guaranteed.Minimum 30 day warranty on all work.

"Very happy with the company. We will use them in the future."

Nikki T on March 2023

Full service drain cleaning company with only highly experienced technicians.24 hour service at 1 fair rate.Satisfaction guaranteed.Minimum 30 day warranty on all work.

"Very happy with the company. We will use them in the future."

Nikki T on March 2023

...
Showing 1-10 of 961

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.

Share project details to get started.