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

Avatar for USA Water Heaters - Installation & Repair
USA Water Heaters - Installation & Repair
4.9(
102
)
Tankless Water Heater - Repair

Serving Fullerton, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Warranties offered

"Dennis installed a new 75 gallon water heater and circulation pump in our home. His price was very competitive and lower than several other bids we got. He communicated with us well throughout the entire process. He worked around our schedule and the installation took only a couple of hours. The new water heater is working perfectly. I highly recommend Dennis and USA Water Heaters."
Navien Tankless Water Heater Installation in IrvIne, CA
Water heater installation and repair service in Mission Viejo, Ladera Ranch, Lake Forest, Las Flores, Rancho Santa Margarita, Trabuco Canyon, Coto De Caza, Foothill Ranch, Laguna Hills, Aliso Viejo, Laguna Niguel, Laguna Woods, Laguna Beach, Dana Point, San Juan Capistrano, San Clemente, Irvine, Tustin, Santa Ana, Orange, Villa Park, Anaheim, Anaheim Hills, Brea, Yorba Linda, Newport Coast, Newport Beach, Costa Mesa, Huntington Beach, Fountain Valley, Garden Grove, Westminister, Placentia, Full
AO Smith water heater installation Laguna Niguel, CA
Navien tankless water heater installation Irvine, CA
Same-day water heater installation and repair service in Orange County, CA

+32

Response time7 hrs
Response rate100%
Recommended by93%of homeowners
Avatar for THE Water Heater Company
THE Water Heater Company
4.9(
134
)
Tankless Water Heater - Repair

Serving Fullerton, CA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"The Water Heater Company, â The Company With A Heartâ My 100 gallon hot water heater broke on Sunday evening. I immediately got on line and started looking. The first thing I saw was The Water Heater Company 24/7. I called and got a representative, after verbalizing the specifics of my issues, she promptly set up an appointment the next day from 3 to 4 on Monday. I was under the assumption that I needed a new unit and I needed it the next day. I only had Monday to rectify this issue. Tuesday morning an ill loved one was coming to be cared for all of November. The Representative stated that she would have her tech person contact me the next morning. I was worried. I had one day to acquire a 100 gallon Water Heater and have it installed, an unrealistic timeframe. While pondering my dilemma , I started thinking maybe a tankless water heater would work to replace the 100, gallon tank. I dialed the number back and got Anthony. He knew who I was and my issue and immediately gave me a very concise answer to why that wouldnâ t work. He then ask me a few questions regarding the problem. He stated that his company could probably repair the issue the next day. He had looked up the specs for my existing heater. The only issue was that the part for the repair was in another part of California. I relayed my timeframe regarding my Ill loved one. He stated that he would have the part couriered and they would be at my home at 1 the next day. They were prompt and efficient. I have never had a company take my issues into consideration and seamlessly rectify my issue with such compassion and professionalism."
Van (Side view)
TWHC Vans
TWHC Vans
TWHC Vans
TWHC Vans

+83

Response time7 hrs
Response rate92%
Recommended by84%of homeowners
Avatar for Payless Water Heaters & Plumbing
Payless Water Heaters & Plumbing
4.2(
132
)
Tankless Water Heater - Repair

Serving Fullerton, 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 J I G Plumbing
J I G Plumbing
4.9(
98
)
Tankless Water Heater - Repair

Serving Fullerton, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Had a old 30 year 75 gallon leaking hot water heater. JIG Owner came out to the and assessed the problem and offered a replacement unit or upgrade to a tankless! I selected the tankless. Excellent installation, and removal of the old unit. Crew showed up on time, very professional and made sure I understood the warranty terms and conditions along with the operation of the unit. The owner followed up with a followup inspection to ensure I was happy."
Completed Install
Preparing new install
Completed Install
Completed Install
Completed Install

+8

47 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Phill's Plumbing
Phill's Plumbing
4.7(
316
)
Tankless Water Heater - Repair

Serving Fullerton, CA and surrounding areas

Approved

In business since 1991

Emergency services offered

Warranties offered

"Great, Phill came out the next day and got us up and running again with hot water. He is honest, thorough and does the job right the first time. We have used him several times for various plumbing issues and have been very satisfied."
Additional Photos
Additional Photos
Additional Photos
Response time6 hrs
Response rate100%
Recommended by93%of homeowners
Avatar for Albano's Plumbing & Drain
Albano's Plumbing & Drain
4.8(
49
)
Tankless Water Heater - Repair

Serving Fullerton, CA and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"Albano's responded quickly to my plumbing emergency. They replaced my water heater and cleared a drain stoppage in a timely manner. They are fair in pricing, I would recommend them to anyone looking for a fast and reliable plumber."
Keith
Lucas
Roberto
Shower Before
Shower After

+7

Response time9 hrs
Response rate100%
Recommended by89%of homeowners
Avatar for Pristine Plumbing, Inc.
Pristine Plumbing, Inc.
4.1(
57
)
Tankless Water Heater - Repair

Serving Fullerton, CA and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"The installation was very efficient and the crew did an excellent job in regards to the plumbing hookups and testing. I highly recommend this company and would use them for future projects. I want to comment that this job was in a second floor condominium with very steep stairs and no elevator. To those who wonder how a very heavy 50 gallon water heater is naviga!ted down those stairs without scarring the newly painted walls, l can only say they managed perfectly. No dings anywhere. Good job guys"
Doing It Right!
Drain Repair
Garrett
Gas Installation
Tankless Heater

+6

Response time7 hrs
105 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Alpine Plumbing, Heating, and Air
Alpine Plumbing, Heating, and Air
4.7(
37
)
Tankless Water Heater - Repair

Serving Fullerton, 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
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