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Top-Rated Tankless water heater repair pros in Gainesville - Updated Nov 2026

Avatar for Baker Brothers Plumbing, Air & Electric
Baker Brothers Plumbing, Air & Electric
4.3(
1,467
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

Approved

Super Service Award Winner

In business since 1945

Free estimates

Emergency services offered

"Had two gas water heaters go out simultaneously. I called Baker Bros ijn the evening and had a technician the next day. He quickly diagnosed the problem and replaced the heaters. My sons were thrilled to have hot water, and the rest of us were thrilled they were able to bathe again."
Jimmie Dale, Jr.- 3rd Generation Owner
The Baker Brothers Team
Service Truck
Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Ironclad Plumbing LLC
Ironclad Plumbing LLC
5.0(
6
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

Approved

Free estimates

Credit card accepted

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.

Water Heaters
Drain Cleaning
General Plumbing
16 neighbors recently requested a quote
Avatar for Underwood Plumbing and Septic
Underwood Plumbing and Septic
4.1(
11
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

Approved

In business since 2020

Emergency services offered

Warranties offered

Underwood Plumbing and Septic is your go-to solution for all plumbing and septic needs in Collin, Fannin, Grayson, Lamar and Delta Counties. Our team of expert plumbers and technicians offers top-notch services, including plumbing installations, repairs and specialized septic system maintenance. Whether you need a quick fix or a complete system overhaul, our professionals are dedicated to delivering efficient and reliable solutions tailored to your specific requirements. With decades of experience, we have built a solid reputation for excellence in the industry. Customers trust us for our timely responses, attention to detail, and top-notch plumbing and septic services. By no means comprehensive, we do water heater installs and repairs, plumbing fixture repairs, sewer repairs, hydro-jetting, septic system component maintenance, septic pumping, and many more services! Send us a message or give us a call to get a solution to your problem today. We offer senior citizen discounts.

Control Panel
House Filtration
Septic Service Tech
Septic Tank Pumping
Septic Tank Pumping

+24

31 neighbors recently requested a quote
Avatar for Benjamin Franklin Plumbing of Sherman
Benjamin Franklin Plumbing of Sherman
4.4(
9
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

Approved

In business since 2023

Emergency services offered

Warranties offered

Benjamin Franklin Plumbing 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.

New Water Heater
Response time7 hrs
Response rate96%
26 neighbors recently requested a quote
Avatar for Ecowater Texas
Ecowater Texas
4.7(
142
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"TL:DR The American-made equipment works very well. The company ultimately assured the installation was complete and correct. But it was a rocky road. It was easy to schedule an appointment with a sales person. He spent a lot of time trying to sell me a system, when in fact I'd already done my research and knew I wanted to buy their products if they could improve my water quality. The salesman was able to give me measurements of dissolved solids and pH, which was important to me. Installation was fast; within about a week, our system was in place! Unfortunately, the installation did not pass inspection. When I contacted EcoWater Texas about the problem, the owner said the inspector was being unreasonable, and this had never happened before. He said he was uncomfortable having his plumber do the work the inspector required, and I would have to find someone else to do it. He said he'd pay the cost if it was reasonable. I contacted the inspector to get a detailed explanation of the work to be done. The inspector came over and gave me a red tag, formally failing the installation. He said I should call EcoWater Texas and tell them I had the tag, and if I submitted the tag to the licensing board they'd make it right. When I did that, EcoWater Texas agreed to find a plumber to do the work and cover the costs. The new plumber finished the installation, and it passed inspection. I then asked EcoWater Texas to test my water to make sure the system was working as advertised. This took a little time, but the salesman returned and did the testing. That's when I learned the system was only treating half my water! The rest entered the house in a different place. Apparently EcoWater Texas didn't check for that when they did the original installation. So EcoWater Texas had the second plumber come back and tie in the rest of the house water. The entire process took several months."
ERO 375
Credits
Softeners and Refiners
Recommended by91%of homeowners
Avatar for STUART HVAC, LLC
STUART HVAC, LLC
4.7(
49
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

In business since 2005

Emergency services offered

Credit card accepted

"Stuart HVAC, LLC Was amazing.  Stuart's knowledge, professionalism and attention to detail saved me time and money.  The man really knows his AC and heating.  He did so well on my air-conditioning system replacement that I had him come back out and replace my hot water heater.  All of which are working perfectly! 
I would recommend him to anyone who is seeking an honest, hardworking and skilled person in this area.
Regards,
Leslie
"
Recommended by93%of homeowners
Avatar for Lone Star Water Services
Lone Star Water Services
4.6(
93
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

In business since 2004

Free estimates

Credit card accepted

"They did a great job! It went faster than I expected. I asked one of the guys if he had time, would he check a leak under my kitchen sink. He was very thorough. It turns out that we had a bolt still attached underneath the sink from a previous water filter installation. We needed a different type of bolt and he switched the bolts for free! He even gave me some much needed advice to help prevent further leaks from the faucet area. I really appreciated the extra mile! I am very pleased with Lone Star Water Services and would gladly recommend them to others."
Recommended by88%of homeowners
Avatar for Lonnie Bravo Plumbing
Lonnie Bravo Plumbing
4.9(
15
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"A contractor I’ve been doing business with contacted Lonnie early Tuesday morning to perform plumbing services related to a broken water pipe. While at the house he: made a thorough inspection of all areas showing damage, and replaced a length of copper pipe with (far superior) pex pipe. The copper pipe had burst during the freeze of January 2024. He was diligent and careful to remove only those portions of drywall and other materials to evaluate the extent of water damage. Along the way, he made (plumbing-related) suggestions that would ultimately be money-saving. For example, he suggested getting a tankless water heater and tomorrow, he will install an icemaker connection box for our refrigerator. Lonnie is very professional, knowledgeable and personable. He provides excellent plumbing services and he places them far above profit. I highly recommend him."
Recommended by93%of homeowners
Avatar for NUTS AND BOLTS HARDWARE
NUTS AND BOLTS HARDWARE
5.0(
32
)
Tankless Water Heater - Repair

Serving Gainesville, TX and surrounding areas

In business since 2009

Credit card accepted

We are locally owned and operated by REAL HARDWARE FOLKS that have been serving customers with integrity for over 30 years. Our staff has a REAL PASSION for hardware, and we strive to make each and every customer a repeat customer. Whether you own or rent your home, operate a small or large business, work for yourself or someone else, we want to earn your business. Our goal is to earn your trust so that we are your FIRST STOP HARDWARE SHOP. At Nuts and Bolts Hardware, we really do appreciate your business. Come see us, then tell your friends and family about your experience. \nThank you!

Recommended by100%of homeowners
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