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Tankless water heater repair pros in Sunnyvale

Avatar for AStar Heat & Air, Inc.
AStar Heat & Air, Inc.
9201 S Forest Lane
3.68(
17
)
Approved Pro
AStar Heat & Air, Inc.
9201 S Forest Lane
3.68(
17
)
Approved Pro
252 local quotes requested
28 years of experience

A-Star Air Conditioning, Plumbing & Electric has been dedicated to this craft for more than 26 years. We pride the company on reliability, excellent communication, integrity, and quality work. We strongly believe in giving our absolute best in all our projects no matter how big or small. We look forward to earning your business!

"I over paid for the work that was delivered. I had to replace the 2nd of two hose bibs myself including paying for the parts for this item that was my #1 priority when I hired them. Will not hire them or recommend them."

Jeff T on March 2025

A-Star Air Conditioning, Plumbing & Electric has been dedicated to this craft for more than 26 years. We pride the company on reliability, excellent communication, integrity, and quality work. We strongly believe in giving our absolute best in all our projects no matter how big or small. We look forward to earning your business!

"I over paid for the work that was delivered. I had to replace the 2nd of two hose bibs myself including paying for the parts for this item that was my #1 priority when I hired them. Will not hire them or recommend them."

Jeff T on March 2025


Avatar for blueFrog Plumbing + Drain of North Dallas
blueFrog Plumbing + Drain of North Dallas
207 King Road, Suite 301
4.65(
288
)
Approved Pro
blueFrog Plumbing + Drain of North Dallas
207 King Road, Suite 301
4.65(
288
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
259 local quotes requested

bluefrog Plumbing + Drain of North Dallas is the solution for all your drain and plumbing needs. We take great pride in our honesty, extreme professionalism, timeliness, and superior customer service, on every job, large or small. bluefrog Plumbing + Drain will deliver a lasting impression, developing a relationship with you and your home, so that the next time service is needed, there will be no question regarding who to call. Satisfaction guaranteed! Give us a call today. bluefrog Plumbing + Drain service experts are happy to help you with your plumbing project. All services are evaluated on-site, at service location, so that you may be completely informed and educated concerning your plumbing needs, ensuring "the right price for the right fix". We look forward to speaking with you today!

"Good"

Heather R on June 2025

bluefrog Plumbing + Drain of North Dallas is the solution for all your drain and plumbing needs. We take great pride in our honesty, extreme professionalism, timeliness, and superior customer service, on every job, large or small. bluefrog Plumbing + Drain will deliver a lasting impression, developing a relationship with you and your home, so that the next time service is needed, there will be no question regarding who to call. Satisfaction guaranteed! Give us a call today. bluefrog Plumbing + Drain service experts are happy to help you with your plumbing project. All services are evaluated on-site, at service location, so that you may be completely informed and educated concerning your plumbing needs, ensuring "the right price for the right fix". We look forward to speaking with you today!

"Good"

Heather R on June 2025


Avatar for Sewell Plumbing Services
Sewell Plumbing Services
1915 University Business Dr Suite 407
5.00(
7
)
Approved Pro
Sewell Plumbing Services
1915 University Business Dr Suite 407
5.00(
7
)
Approved Pro
Customers say: Quick response
3 years of experience
Free onsite estimate

We take great pride in our experience, expertise, and quality of the customer service we provide to meet our consumers needs. It is our mission to provide excellent workmanship, and 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.

"They were quick and efficient and their proposal matched the final cost."

Robert B on January 2024

We take great pride in our experience, expertise, and quality of the customer service we provide to meet our consumers needs. It is our mission to provide excellent workmanship, and 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.

"They were quick and efficient and their proposal matched the final cost."

Robert B on January 2024


Avatar for Saving Grace Plumbing INC
Saving Grace Plumbing INC
3325 Interstate 30
4.80(
35
)
Approved Pro
Saving Grace Plumbing INC
3325 Interstate 30
4.80(
35
)
Approved Pro
Customers say: True professional
284 local quotes requested
15 years of experience

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"The techs were not prepared to descale both of my tankless water heaters when they arrived; they had to wait 30 minutes for another tech to drop off the pumps since they did not have any on their truck. In my initial request in Angi, I requested Vinegar for the descaling solution and to run it through the pumps at least 60 minutes, as both units had not been descalled in a couple of years. On one of my units, they did use Vinegar; however, on the other unit, they used Haymaker descaler. My Rinnai tankless water heater manual specifically states to NOT use any other chemicals to descale besides distilled white vinegar. Also, in my request, I asked for the techs to use compressed air to clean out the radiators/fins that are on top of the copper coils; they did not show me that they cleaned either of them. Other than the technicians and the work performed, the customer service over the phone and texts were above par. They kept me informed and also had available appointments the next day."

Therese S on May 2025

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workmanship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"The techs were not prepared to descale both of my tankless water heaters when they arrived; they had to wait 30 minutes for another tech to drop off the pumps since they did not have any on their truck. In my initial request in Angi, I requested Vinegar for the descaling solution and to run it through the pumps at least 60 minutes, as both units had not been descalled in a couple of years. On one of my units, they did use Vinegar; however, on the other unit, they used Haymaker descaler. My Rinnai tankless water heater manual specifically states to NOT use any other chemicals to descale besides distilled white vinegar. Also, in my request, I asked for the techs to use compressed air to clean out the radiators/fins that are on top of the copper coils; they did not show me that they cleaned either of them. Other than the technicians and the work performed, the customer service over the phone and texts were above par. They kept me informed and also had available appointments the next day."

Therese S on May 2025


Avatar for TopTech Electric & Plumbing
TopTech Electric & Plumbing
7415 Whitehall Street Unit 119
4.89(
31
)
Approved Pro
TopTech Electric & Plumbing
7415 Whitehall Street Unit 119
4.89(
31
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
210 local quotes requested

EASY 24/7 ONLINE BOOKING AT www.calltoptech.com Our team at TopTech Electric & Plumbing is dedicated to providing you a great experience at a competitive price. Our electricians and plumbers are licensed & background checked, trained & knowledgeable, and specialize in handling your homes electrical and plumbing issues right the first time! TopTech Electric & Plumbing is a locally owned and operated company with a high level of integrity and value! We provide UNMATCHED customer service - its our #1 priority. We take pride in our professionalism and cleanliness on our job sites. We arrive within the 3 hour window as scheduled and always provide a courtesy notification when in route! We guarantee your 100% satisfaction & Industry leading warranties on all repairs - Contact us today!

"Prompt, good quality and friendly service."

Steven S on October 2024

EASY 24/7 ONLINE BOOKING AT www.calltoptech.com Our team at TopTech Electric & Plumbing is dedicated to providing you a great experience at a competitive price. Our electricians and plumbers are licensed & background checked, trained & knowledgeable, and specialize in handling your homes electrical and plumbing issues right the first time! TopTech Electric & Plumbing is a locally owned and operated company with a high level of integrity and value! We provide UNMATCHED customer service - its our #1 priority. We take pride in our professionalism and cleanliness on our job sites. We arrive within the 3 hour window as scheduled and always provide a courtesy notification when in route! We guarantee your 100% satisfaction & Industry leading warranties on all repairs - Contact us today!

"Prompt, good quality and friendly service."

Steven S on October 2024


Avatar for Willard Heating, Cooling & Plumbing
Willard Heating, Cooling & Plumbing
207 E US Highway 80 Unit 102
3.75(
2
)
Approved Pro
Willard Heating, Cooling & Plumbing
207 E US Highway 80 Unit 102
3.75(
2
)
Approved Pro
Customers say: Quick response
15 local quotes requested
15 years of experience

Plumbing problems are more than just an inconvenience — they can disrupt your daily life. You depend on your plumbing system for washing clothes, cleaning dishes, bathing, and more. When you’re dealing with a leaky faucet, clogged drain, or worse, you can depend on us to restore your comfort. Our trained plumbers will arrive promptly, inspect and diagnose the issue, and provide an effective solution. We back our work with unbeatable guarantees, such as our peace of mind guarantee and 100% money-back guarantee, so you can be confident the job will be done right when you call us.

"We've used them for years and very happy."

Mona H on December 2023

Plumbing problems are more than just an inconvenience — they can disrupt your daily life. You depend on your plumbing system for washing clothes, cleaning dishes, bathing, and more. When you’re dealing with a leaky faucet, clogged drain, or worse, you can depend on us to restore your comfort. Our trained plumbers will arrive promptly, inspect and diagnose the issue, and provide an effective solution. We back our work with unbeatable guarantees, such as our peace of mind guarantee and 100% money-back guarantee, so you can be confident the job will be done right when you call us.

"We've used them for years and very happy."

Mona H on December 2023


Avatar for Benjamin Franklin Plumbing
Benjamin Franklin Plumbing
1100 Jupiter Rd Unit 150 A
4.47(
189
)
Approved Pro
Benjamin Franklin Plumbing
1100 Jupiter Rd Unit 150 A
4.47(
189
)
Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
10 local quotes requested

We are taking every measure to ensure the safety of our community and employees. To learn more about what we are doing, please read more at: https://www.punctualplumberdallas.com/blog/covid-19-message/ Benjamin Franklin Plumbing offers 24 Hour Emergency Services, no matter the size of the job. Our plumbing company stands behind our work. We offer a 2 year warranty on all repair services. We do the job right, the first time. Only the best plumbers work for Benjamin Franklin Plumbing. Do you have a leaky faucet? Has your garbage disposal gone wrong? Did you find your bathroom flooded in the middle of the night? Ben Franklin Plumbing is your around the clock plumbing solution! Our professional plumbing technicians have the knowledge, skill and equipment to solve all of your plumbing repair and installation needs. Whether it is a pipe leak, flood, clogged drain or a new installation; our professional plumbers are the best in the business. Don't delay, call the best plumbers today!

"I used their coupon for a better price. The plumber fixed the clog quickly. He gave me his assessment upfront and updated me as he troubleshooted. He was patient to answer any questions that I had along the way. If I ever need another plumber for an issue, this company will be my top choice."

Miguel M on October 2023

We are taking every measure to ensure the safety of our community and employees. To learn more about what we are doing, please read more at: https://www.punctualplumberdallas.com/blog/covid-19-message/ Benjamin Franklin Plumbing offers 24 Hour Emergency Services, no matter the size of the job. Our plumbing company stands behind our work. We offer a 2 year warranty on all repair services. We do the job right, the first time. Only the best plumbers work for Benjamin Franklin Plumbing. Do you have a leaky faucet? Has your garbage disposal gone wrong? Did you find your bathroom flooded in the middle of the night? Ben Franklin Plumbing is your around the clock plumbing solution! Our professional plumbing technicians have the knowledge, skill and equipment to solve all of your plumbing repair and installation needs. Whether it is a pipe leak, flood, clogged drain or a new installation; our professional plumbers are the best in the business. Don't delay, call the best plumbers today!

"I used their coupon for a better price. The plumber fixed the clog quickly. He gave me his assessment upfront and updated me as he troubleshooted. He was patient to answer any questions that I had along the way. If I ever need another plumber for an issue, this company will be my top choice."

Miguel M on October 2023


Avatar for Reliant Plumbing
Reliant Plumbing
2702 Manor Way
4.19(
8
)
Approved Pro
Reliant Plumbing
2702 Manor Way
4.19(
8
)
Approved Pro
Customers say: Quick response
272 local quotes requested
13 years of experience

Reliant Plumbing is your local Central Texas plumbing company. We live and work in the greater Dallas and Fort Worth areas, where we offer all plumbing services. We pride ourselves on understanding the unique plumbing needs that come with living in this area. We are committed to providing only the highest quality plumbing repairs, and vow to provide exceptional customer service. We believe in keeping this promise to each and every customer and thats why we guarantee our work.

"Stephen Yates did an excellent job and did it in a timely manner."

DEBORAH S on March 2025

Reliant Plumbing is your local Central Texas plumbing company. We live and work in the greater Dallas and Fort Worth areas, where we offer all plumbing services. We pride ourselves on understanding the unique plumbing needs that come with living in this area. We are committed to providing only the highest quality plumbing repairs, and vow to provide exceptional customer service. We believe in keeping this promise to each and every customer and thats why we guarantee our work.

"Stephen Yates did an excellent job and did it in a timely manner."

DEBORAH S on March 2025


Avatar for Triple R Contracting Services
Triple R Contracting Services
11139 Cotillion Drive
5.00(
15
)
Approved Pro
Triple R Contracting Services
11139 Cotillion Drive
5.00(
15
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
124 local quotes requested

Triple R Contracting Services specializes in full remodels to give your home a modern-day look. Our architecture design team will help homeowners visualize the dream even before the work begins. We excel in kitchen and bathroom remodels, framing; sheetrock; texture; paint; backsplashes; tile work; countertops of all types; top line cabinetry with soft closing doors; flooring in stone, luxury vinyl plank, tiles; wood and much much more. Contact us to discuss your dream project today!

"Took the kitchen down to the studs. Replaced cabinets, sink, all appliances, counter tops. Some hiccups along the way but issues were resolved. Took a sad kitchen and made it shine."

Tara W on May 2025

Triple R Contracting Services specializes in full remodels to give your home a modern-day look. Our architecture design team will help homeowners visualize the dream even before the work begins. We excel in kitchen and bathroom remodels, framing; sheetrock; texture; paint; backsplashes; tile work; countertops of all types; top line cabinetry with soft closing doors; flooring in stone, luxury vinyl plank, tiles; wood and much much more. Contact us to discuss your dream project today!

"Took the kitchen down to the studs. Replaced cabinets, sink, all appliances, counter tops. Some hiccups along the way but issues were resolved. Took a sad kitchen and made it shine."

Tara W on May 2025


Avatar for Team Enoch Plumbing
Team Enoch Plumbing
8940 Creek Run Rd
4.99(
122
)
Approved Pro
Team Enoch Plumbing
8940 Creek Run Rd
4.99(
122
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4383 local quotes requested

Team Enoch is an electrical, plumbing, HVAC and roofing services company that is passionate about providing the best value and service in the industry. Our technicians are licensed and insured. We would love the opportunity to give you a free estimate over the phone. Give us a call or send us an email with the specifics of your job.

"Nick was very informative and explained the process to me. He was very respectful of my home by wearing shoe covers to ensure that dirt and debris didn’t come in and let me know of how to do the aftercare when I expressed my concern of the water damage."

Katrina S on April 2025

Team Enoch is an electrical, plumbing, HVAC and roofing services company that is passionate about providing the best value and service in the industry. Our technicians are licensed and insured. We would love the opportunity to give you a free estimate over the phone. Give us a call or send us an email with the specifics of your job.

"Nick was very informative and explained the process to me. He was very respectful of my home by wearing shoe covers to ensure that dirt and debris didn’t come in and let me know of how to do the aftercare when I expressed my concern of the water damage."

Katrina S on April 2025

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FAQs for tankless water heater installation projects in Sunnyvale, TX

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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