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 San Marcos

Avatar for Murphy's Plumbing LLC
Murphy's Plumbing LLC
716 Scheel
5.00(
4
)
Approved Pro
Murphy's Plumbing LLC
716 Scheel
5.00(
4
)
Approved Pro
Free onsite estimate
Emergency services offered

Murphy's Plumbing offers top-tier plumbing solutions for both residential and commercial customers. We're committed to providing you with the highest quality service, available 24/7, so you can have peace of mind that assistance is just a phone call away. Plus! We offer free estimates to ensure transparency and trust in every project. Give us a call today!

"I recently hired Taylor from Murphy's pluming for a plumbing issue with my bathroom shower. He was quick to respond and arrived on time and most importantly got the problem I was having with my shower fixed quickly and it is working perfectly now!! I highly recommend Taylor for anyone looking for a reliable and skilled plumber!"

Stephanie B on June 2025

Murphy's Plumbing offers top-tier plumbing solutions for both residential and commercial customers. We're committed to providing you with the highest quality service, available 24/7, so you can have peace of mind that assistance is just a phone call away. Plus! We offer free estimates to ensure transparency and trust in every project. Give us a call today!

"I recently hired Taylor from Murphy's pluming for a plumbing issue with my bathroom shower. He was quick to respond and arrived on time and most importantly got the problem I was having with my shower fixed quickly and it is working perfectly now!! I highly recommend Taylor for anyone looking for a reliable and skilled plumber!"

Stephanie B on June 2025


Avatar for Ben Franklin Plumbing of San Marcos
Ben Franklin Plumbing of San Marcos
1409 N. Bishop St. Suite B5
5.00(
1
)
Approved Pro
Ben Franklin Plumbing of San Marcos
1409 N. Bishop St. Suite B5
5.00(
1
)
Approved Pro
1 years of experience
Emergency services offered

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s 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 consumer’s 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 Honest Plumbing & Air
Honest Plumbing & Air
112 MCNUTT RD
4.85(
17
)
Approved Pro
Honest Plumbing & Air
112 MCNUTT RD
4.85(
17
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
32 local quotes requested

Honest Plumbing & Air has been providing the best in HVAC and plumbing services to residents across Central Texas. Above all, we operate on the belief that honesty is the best policy. We will take the time to properly assess your specific situation and we will not overcharge you for unnecessary work. You can rest assured that when you call Honest Plumbing & Air, you're getting a professional technician who will be straightforward with you every step of the way. Our team will effectively diagnose your air conditioning, heating, or plumbing problem, without exaggerating the truth.

"Our AC went out and we called Honest Air. Randy came out to diagnose the problem and did his best to save our old system. The system was too far gone so he helped us pick a new system that would meet our needs and help us save energy. Install day, we had Jeremy, Kade and Logan come in to set up out new system. They were great! They were nice, informative, efficient and courteous to our needs. They also informed us of an issue from the original install of our old system and are going to come back out to correct it for us."

Juli F on June 2020

Honest Plumbing & Air has been providing the best in HVAC and plumbing services to residents across Central Texas. Above all, we operate on the belief that honesty is the best policy. We will take the time to properly assess your specific situation and we will not overcharge you for unnecessary work. You can rest assured that when you call Honest Plumbing & Air, you're getting a professional technician who will be straightforward with you every step of the way. Our team will effectively diagnose your air conditioning, heating, or plumbing problem, without exaggerating the truth.

"Our AC went out and we called Honest Air. Randy came out to diagnose the problem and did his best to save our old system. The system was too far gone so he helped us pick a new system that would meet our needs and help us save energy. Install day, we had Jeremy, Kade and Logan come in to set up out new system. They were great! They were nice, informative, efficient and courteous to our needs. They also informed us of an issue from the original install of our old system and are going to come back out to correct it for us."

Juli F on June 2020


Avatar for Mr. Rooter Plumbing of Austin
Mr. Rooter Plumbing of Austin
12201 Roxie Dr
3.82(
28
)
Approved Pro
Mr. Rooter Plumbing of Austin
12201 Roxie Dr
3.82(
28
)
Approved Pro
Customers say: Quality work
225 local quotes requested
55 years of experience

Mr. Rooter Plumbing of Austin is standing by to take care of any plumbing issues you might have in your home. Our team is known for being friendly, punctual, knowledgeable, efficient, and clean. Our Austin plumbing services are known for being effective and competitively priced. Keep your home’s plumbing systems in tip-top conditions with the help of Mr. Rooter Plumbing of Austin. With routine maintenance, we can help you avoid major plumbing problems. But if they do happen, our repair services can get us at your door quickly to get things under control, even for emergencies that happen at odd hours and on weekends or holidays! We bring you the best of all worlds when you call on us to work on your Austin home plumbing services. You get the personability and quick turn-around times of a local plumber. But you also get the advanced training and top-grade equipment of a corporate plumbing company!

"It went well. They heiped get the manufacture to replace the heater for no charge. We had to pay for labor but still we didn't have to pay for the heater. Aaron was friendly and did a great job."

Cate S on July 2023

Mr. Rooter Plumbing of Austin is standing by to take care of any plumbing issues you might have in your home. Our team is known for being friendly, punctual, knowledgeable, efficient, and clean. Our Austin plumbing services are known for being effective and competitively priced. Keep your home’s plumbing systems in tip-top conditions with the help of Mr. Rooter Plumbing of Austin. With routine maintenance, we can help you avoid major plumbing problems. But if they do happen, our repair services can get us at your door quickly to get things under control, even for emergencies that happen at odd hours and on weekends or holidays! We bring you the best of all worlds when you call on us to work on your Austin home plumbing services. You get the personability and quick turn-around times of a local plumber. But you also get the advanced training and top-grade equipment of a corporate plumbing company!

"It went well. They heiped get the manufacture to replace the heater for no charge. We had to pay for labor but still we didn't have to pay for the heater. Aaron was friendly and did a great job."

Cate S on July 2023


Avatar for Excalibur Plumbing
Excalibur Plumbing
11880 Old 2243 W
4.68(
2,176
)
Approved Pro
Excalibur Plumbing
11880 Old 2243 W
4.68(
2,176
)
Approved Pro
Customers say: Super punctual
678 local quotes requested
15 years of experience

Serving the Austin metro, we specialize in all plumbing repairs. We have the most reviews in Austin Texas on Angie's list. Top Plumber all A in all categories. Up to 15% off Angie customers- Call us anytime for a free estimate 512-259-7222. FREE ESTIMATES!!!!

"They are always on time, knowledgeable, and do a thorough job. Once, when the motherboard of one of our tankless water heaters died, their technician spent an hour on the phone with the manufacturer figuring out what was wrong in the way both units were set up. They saved the second motherboard before it failed by setting both up properly! Now I use Excalibur to service our two houses that we rent out. They recently installed a garbage disposal in one."

Barbara C on September 2018

Serving the Austin metro, we specialize in all plumbing repairs. We have the most reviews in Austin Texas on Angie's list. Top Plumber all A in all categories. Up to 15% off Angie customers- Call us anytime for a free estimate 512-259-7222. FREE ESTIMATES!!!!

"They are always on time, knowledgeable, and do a thorough job. Once, when the motherboard of one of our tankless water heaters died, their technician spent an hour on the phone with the manufacturer figuring out what was wrong in the way both units were set up. They saved the second motherboard before it failed by setting both up properly! Now I use Excalibur to service our two houses that we rent out. They recently installed a garbage disposal in one."

Barbara C on September 2018


Avatar for Indigo Home and Facility Services
Indigo Home and Facility Services
1005 Meredith Dr
4.80(
45
)
Approved Pro
Indigo Home and Facility Services
1005 Meredith Dr
4.80(
45
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
490 local quotes requested

Top-Notch Repair and Remodel Services form a Reputed Local Company You can safely rely on our one-stop team of Electricians, Plumbers, and General Repair Technicians to get the job done right. We provide the solutions that work best for your home or facility. As a Texas-based company, we know our local market well and always offer cost-effective solutions. Customer satisfaction is our top priority. Every team member strives to provide top-notch services. https://indigoservices-tx.com/

"Great! Tech was friendly, knowledgeable, and very helpful when questioned about the issue. I will be calling Indigo next time I need any work done around the house."

Kevin H on March 2025

Top-Notch Repair and Remodel Services form a Reputed Local Company You can safely rely on our one-stop team of Electricians, Plumbers, and General Repair Technicians to get the job done right. We provide the solutions that work best for your home or facility. As a Texas-based company, we know our local market well and always offer cost-effective solutions. Customer satisfaction is our top priority. Every team member strives to provide top-notch services. https://indigoservices-tx.com/

"Great! Tech was friendly, knowledgeable, and very helpful when questioned about the issue. I will be calling Indigo next time I need any work done around the house."

Kevin H on March 2025


Avatar for WJP Renovation LLC
WJP Renovation LLC
9908 MATEO CV
5.00(
49
)
Approved Pro
WJP Renovation LLC
9908 MATEO CV
5.00(
49
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
445 local quotes requested

WJP Renovation LLC specializes in kitchen and bathroom renovations as well as granite and marble countertop installation and fabrication. It is a family-owned business that provides outstanding services. We understand the importance of feeling comfortable in your own home. You can count on our dedication to quality and our ability to maximize the value of your home. From initial consultation to installation, WJP Renovation will provide exemplary service and attention to detail. At WJP Renovation we specialize in kitchen and bathroom remodeling. The kitchen is the most important room in any house. From breakfast to dinner, it’s the focal social space of the modern American home. We can also give you a bathroom that is not only functional but features your own personal touch. From custom tile work to the perfect light fixtures, we’ll make sure your bathroom is an intimate sanctuary to unwind and feel at peace in.

"all the grout and surrounding silicone caulk needed to be removed and replaced with new product. not a large project however heavy use area so important the work was performed well. Service REP was very meticulous, thorough and respectful including full clean-up."

Andrew K on April 2025

WJP Renovation LLC specializes in kitchen and bathroom renovations as well as granite and marble countertop installation and fabrication. It is a family-owned business that provides outstanding services. We understand the importance of feeling comfortable in your own home. You can count on our dedication to quality and our ability to maximize the value of your home. From initial consultation to installation, WJP Renovation will provide exemplary service and attention to detail. At WJP Renovation we specialize in kitchen and bathroom remodeling. The kitchen is the most important room in any house. From breakfast to dinner, it’s the focal social space of the modern American home. We can also give you a bathroom that is not only functional but features your own personal touch. From custom tile work to the perfect light fixtures, we’ll make sure your bathroom is an intimate sanctuary to unwind and feel at peace in.

"all the grout and surrounding silicone caulk needed to be removed and replaced with new product. not a large project however heavy use area so important the work was performed well. Service REP was very meticulous, thorough and respectful including full clean-up."

Andrew K on April 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
4644 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


Avatar for AW Remodeling and Construction
AW Remodeling and Construction
123 Main St.
5.00(
9
)
Approved Pro
AW Remodeling and Construction
123 Main St.
5.00(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
265 local quotes requested

We have 15 years experience and specialize in all phases of remodeling for your home. We pride ourselves on the quality work we provide, while delivering great customer service. Please call -or- click to schedule an estimate today!

"AMAZING. AW Remodeling and Construction is our family GO-TO for literally anything and everything. Never had a better experience with basic handy-man needs AND an entire remodel of our upstairs bedroom and bathroom. AW is Remodeling & Construction is our first recommendation to anyone and everyone who needs help around their house.. and the first to choose when you need major construction on your property. Incredible customer service, cost-effective, and full of integrity along the way. I couldn't recommend AW higher or with more confidence. The Ivey family has ONE person they call when they need someone. It's AW every single time."

Aaron I on January 2024

We have 15 years experience and specialize in all phases of remodeling for your home. We pride ourselves on the quality work we provide, while delivering great customer service. Please call -or- click to schedule an estimate today!

"AMAZING. AW Remodeling and Construction is our family GO-TO for literally anything and everything. Never had a better experience with basic handy-man needs AND an entire remodel of our upstairs bedroom and bathroom. AW is Remodeling & Construction is our first recommendation to anyone and everyone who needs help around their house.. and the first to choose when you need major construction on your property. Incredible customer service, cost-effective, and full of integrity along the way. I couldn't recommend AW higher or with more confidence. The Ivey family has ONE person they call when they need someone. It's AW every single time."

Aaron I on January 2024


Avatar for Hill Country Tub and Shower
Hill Country Tub and Shower
5.00(
8
)
Approved Pro
Hill Country Tub and Shower
5.00(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1605 local quotes requested

Operating as a local family-owned business, we bring a rich 30-year expertise to your doorstep. We’ve established a name for ourselves through our steadfast devotion to high-end services, premier materials, and an unrivaled dedication to making our customers happy. We’ve covered all your needs, from designing your home to professional installations. With us, your vision isn’t just a fantasy but a reasonable, affordable reality.

"Excellent work. Very professional staff. On time and efficient. Clean."

Peter N on March 2025

Operating as a local family-owned business, we bring a rich 30-year expertise to your doorstep. We’ve established a name for ourselves through our steadfast devotion to high-end services, premier materials, and an unrivaled dedication to making our customers happy. We’ve covered all your needs, from designing your home to professional installations. With us, your vision isn’t just a fantasy but a reasonable, affordable reality.

"Excellent work. Very professional staff. On time and efficient. Clean."

Peter N on March 2025

...
Showing 1-10 of 951

FAQs for tankless water heater installation projects in San Marcos, 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.

Share project details to get started.