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

Avatar for Payless Water Heaters & Plumbing
Payless Water Heaters & Plumbing
4.2(
132
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Perfectly. They cleaned everything up, explained how the system worked and how often it needs attention, and hauled away the old hot water heater. They arrived on time, worked steadily, and finished before dinner time."
New Tankless Water Heater Installation
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+19

Response time8 hrs
Response rate100%
Recommended by73%of homeowners
Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"Western Rooter to the rescue again! I had a small underground leak which appeared to be due to a bad sprinkler valve. A sprinkler repair company determined that it was not a bad sprinkler valve and thought it was due to a leak in the main water line. Daniel and Alex dug down to find that the leak was coming from a very old (at least 36 years) broken pvc line. After much testing and head scratching to try to figure out where the water was coming from, they decided to "chase the pipe." After much digging, they found that the very old broken pvc pipe was hooked up to a sprinkler valve that was buried 18 inches underground that had not been capped--only turned off. Roots from a nearby tree had opened the valve which caused the leak--crazy! The current sprinkler system has been the same one since we moved into the house in 1988. It took 36 years for the underground leak to occur!"
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for J I G Plumbing
J I G Plumbing
4.9(
98
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"The plumber spent a lot of time just trying to figure out the source of the hidden leak. He had a lot of patience. The quality of work was good as was the price. I would definitely hire them again."
Completed Install
Preparing new install
Completed Install
Completed Install
Completed Install

+8

42 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Alpine Plumbing, Heating, and Air
Alpine Plumbing, Heating, and Air
4.7(
36
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Mike came out and helped so much! He was able to diagnose a few things and gave us some great suggestions as to what things we needed to fix. Really loved the professionalism and expertise he brought. All the work was done quickly and efficiently. I'd go to Alpine plumbing again in the future, they do great work."
Plumbing - Drain Cleaning Project
Sewer cleaned of roots and ready for lining
Prepping pipe for lining by removing massive roots
Mixing resin for liners, this resin gardens to create a solid pipe
Sewer robot in the pipe

+26

Response time9 hrs
7 neighbors recently requested a quote
Recommended by67%of homeowners
Avatar for Service Champions Plumbing, Heating & AC
Service Champions Plumbing, Heating & AC
4.4(
50
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"Kayvan was a wonderful service tech! He was on time and professionally checked out the water heater and the HVAC system. He was so polite and friendly. He explained the need for a new filter in the heating unit and showed me photos of the unit located in the attic. He also offered to do a friendly deed for free, which I greatly appreciated, He’s a great asset to Service Champions!"
Area Drain Cleaning
Plumbing
Plumbing
Garbage Disposal
Drain Cleaning

+13

Response time4 hrs
Recommended by79%of homeowners
Avatar for Dr Rooter Plumbing
Dr Rooter Plumbing
5.0(
18
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Offers commercial services

"Dr. Rooter came through for me when I was in a pinch. I needed to connect my tri-fuel generator to my gas line for continuous power. They contacted me within a few minutes and we scheduled a time for later the same day for them to come out and assess the situation. They then provided me with a solution. By later that night my generator was connected to my gas line. They did a very good job. Thanks Dr. Rooter!"
Response time3 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for All Pro Cooling, Heating, Plumbing & Electrical
All Pro Cooling, Heating, Plumbing & Electrical
4.8(
17
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

In business since 1982

Free estimates

Emergency services offered

Since we opened our doors in 1991, All Pro Plumbing, Heating, Air & Electrical has been dedicated to providing residential and commercial customers in Ontario, CA with top-notch plumbing, heating, air conditioning, indoor air quality, and electrical services. Nearly 30 years later, we have grown significantly, but our values have not changed. We are just as committed to customer service and providing you with personalized options to meet your specific needs. We know that when you are dealing with an urgent plumbing, HVAC, or electrical issue, there isn't always time to wait around for hours for your technician to show up. Today, with more technicians, we are able to answer your call 24 hours a day, 7 days a week, and respond to your needs faster, almost always within the hour! When you call us for service, we'll work with you to make sure your problem gets solved according to your specific needs and budget.

My jobs
My jobs
My jobs
My jobs
My jobs

+7

206 neighbors recently requested a quote
Avatar for Service Flow Plumbing
Service Flow Plumbing
5.0(
23
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"Drew came out and did an excellent job diagnosing my clogged bathtub drain. He was on time, efficient, very descriptive in his repair, left left the job totally cleaned up. And it needs to be stated that his price was very reasonable. I’m so happy that I have now found my new go to plumber. I highly recommended Service Flow to my family, friends and to you."
Sewer Main Valve
Sewer Main Valve
Sewer Main Valve
Sewer Main Valve
Sewer Main Valve

+81

Response time8 hrs
Response rate98%
24 neighbors recently requested a quote
Avatar for Right Solution Plumbing
Right Solution Plumbing
4.8(
16
)
Tankless Water Heater - Repair

Serving Rancho Cucamonga, CA and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"James and Tony with Right Solution Plumbing are the right Choice! They will be our go to from now on for our plumbing needs. Thank you so much for taking care of us."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+13

Response time7 hrs
3 neighbors recently requested a quote
Recommended by69%of homeowners
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