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

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

Serving Monrovia, CA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Did a $59 consult only. Turned out the cost of repairing the old heater was almost as much as a new one, so we got a new one, and handled the install ourselves. Luis B was great, knowledgeable, friendly, didn't try to upcharge just to sell a heater, which we appreciated. Gave us an honest evaluation, several options, and was right on time. I will say, though, that the company failed to call me when he was on his way... not a big deal. All in all a good experience."
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 Monrovia, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"I had my tankless water heater serviced by Daniel W. Daniel was throughly professional during his entire visit. I would highly recommend Wester Rooter for all of your plumbing needs."
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%
4 neighbors recently requested a quote
Avatar for Alpine Plumbing, Heating, and Air
Alpine Plumbing, Heating, and Air
4.7(
37
)
Tankless Water Heater - Repair

Serving Monrovia, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Emergency services offered

"Mike was great! He was friendly and knowledgeable. He let me know all the options for replacing my water heater and did the work quickly and neatly. Will definitely be calling him again!"
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
9 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 Monrovia, CA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"Can not say enough positive things about this company. Usually do alot of things diy, but i would hire them any time to do plumbing. Their professionalism is way above board. Prices more than fair. Miguel is a definite asset to this company. When i have a plumbing problem i will definitely call them back. (had another company come before them that could not get the job done and suggested replacing the trap under my bathtub. My home is not on a foundation but a slab, and that means removal of my bathtub. The cost of his visit would have gone from one hundred dollars to thousands. ) Thank you Service Champions!"
Area Drain Cleaning
Plumbing
Plumbing
Garbage Disposal
Drain Cleaning

+13

Response time4 hrs
Recommended by79%of homeowners
Avatar for HARMONY ELECTRIC PLUMBING & AIR INC
HARMONY ELECTRIC PLUMBING & AIR INC
4.8(
36
)
Tankless Water Heater - Repair

Serving Monrovia, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"They called us quickly and got a plumber out within a few days. Super thorough - tested all pipes and water sources to diagnose the problem. They were able to perform maintenance on most bathrooms the same day and improve the water temperature in our showers. Gave helpful, non-biased advice on potential further plumbing improvements. We will likely call this company again for any and all future plumbing needs."
768 neighbors recently requested a quote
Recommended by38%of homeowners
Avatar for Redhead Rooter, Inc.
Redhead Rooter, Inc.
4.8(
43
)
Tankless Water Heater - Repair

Serving Monrovia, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"Shane responded immediately even though it was late in the workday. My plumbing issue was more complicated than expected but Shane and his crew took care of it without hesitation. I would recommend their services in a heartbeat."
Response time7 hrs
354 neighbors recently requested a quote
Recommended by60%of homeowners
Avatar for AD3 PLUMBING
AD3 PLUMBING
4.9(
17
)
Tankless Water Heater - Repair

Serving Monrovia, CA and surrounding areas

Approved

In business since 2022

Free estimates

Offers commercial services

"Adrian and his crews are very punctual, polite, and also very professional. They were able to accommodate my schedule and specific requests for the removal/installation of my water heater. I will definitely recommend Adrian’s services to my friends."
Water Heater Install
Water Heater Install
Replace Toilet Flange
Replace Toilet Flange
Replace Toilet Flange

+6

Response time1 day
Response rate100%
2 neighbors recently requested a quote
Avatar for Merry Plumbing
Merry Plumbing
5.0(
6
)
Tankless Water Heater - Repair

Serving Monrovia, CA and surrounding areas

Approved (Corporate)

In business since 1946

Free estimates

Credit card accepted

At Merry San Marino Plumbing, we've provided plumbing services with a "get the job done right the first time" attitude since 1946. We believe one of the keys to customer satisfaction is long-lasting quality, and that means making sure our solutions not only fix the issue but keep it fixed for a long time to come. This philosophy has earned us a trusted reputation for reliability and exceptional value that we’re eager to uphold with every customer.

3 neighbors recently requested a quote
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