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Top-Rated Water heater repair or service pros in Lake Saint Louis - Updated Nov 2026

Avatar for Super Handy Man, LLC
Super Handy Man, LLC
4.9(
141
)
Water Heater - Repair or Service

Serving Lake Saint Louis, MO and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"I thought I needed to replace my water heater. When I called Don had me trouble shoot several things and it turned out that his suggestions corrected the current situation even though my water heater is 22 years old. His personal service was so friendly that I will definitely use Super Handy Man when this old unit does go out"
Response time5 hrs
Response rate87%
9 neighbors recently requested a quote
Avatar for Dunn Heating Air Conditioning and Plumbing
Dunn Heating Air Conditioning and Plumbing
4.7(
274
)
Water Heater - Repair or Service

Serving Lake Saint Louis, MO and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I needed to replace my parents' 40 year old AC Condenser and coil, and replace it with something that worked with the new furnace my father got installed four years prior. They were able to do the work requested, and also offered to redo the furance installation as the previous company installed it right on the basement floor where any backup/water could possibly get into the system. They were very prompt and showed up on time/on schedule. They were very upfront about costs and pricing and there were no last-minute price changes or hidden fees, which I appreciate. Work was done well and they ensured that everything worked before leaving the job site. The gentlemen working were very professional and understanding. I highly recommend them for anyone looking to replace their HVAC or to correct work that was previously poorly done."
Additional Photos
Response time2 days
15 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for On Time Experts
On Time Experts
4.8(
104
)
Water Heater - Repair or Service

Serving Lake Saint Louis, MO and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

When your home needs help, count on the team that does Whatever It Takes to make it right. On Time Experts Heating, Air & Plumbing, formerly Hosack Plumbing, Heating & Cooling, now brings together the experience of Hosack and Al-Don. We provide trusted heating, cooling, plumbing, and air and water quality services throughout O’Fallon and the Greater St. Louis area.

Recommended by97%of homeowners
Avatar for Winnovation Plumbing and Drain
Winnovation Plumbing and Drain
5.0(
7
)
Water Heater - Repair or Service

Serving Lake Saint Louis, MO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"This is a good company to deal with. James, the owner, was out within one hour to diagnose our problem. The next morning the technicians, Brian and Josh were out to take care of our drain issues. Brian made a point of showing me the camera footage of the main drain. The did a great job on the main and two other drains. They also cleaned up very well when they were done. Brian also noticed an issue with our bathtub stopper and fixed it without an extra charge. The pricing was transparent. They have a nice email notice system and called when they were on the way. The three men I worked with were all very professional and easy to deal with. I would not hesitate to use them again. Phil Lykens"
Water heater install
Shower Valve replacement
Shower Valve replacement
Stack replacement!
Stack replacement!

+3

15 neighbors recently requested a quote
Jerry Kelly Heating, Air Conditioning, Plumbing & Electrical - P
New to Angi
Water Heater - Repair or Service

Serving Lake Saint Louis, MO and surrounding areas

Approved

In business since 1977

Free estimates

Credit card accepted

Since 1977, Jerry Kelly Heating, Air Conditioning, Plumbing & Electrical has helped homeowners in St. Charles and St. Louis Counties keep their homes comfortable, safe, and running smoothly. From repairs and maintenance to new installations, our team is committed to quality workmanship, dependable service, and customer satisfaction.

Avatar for Express Plumbing, LLC
Express Plumbing, LLC
4.4(
289
)
Water Heater - Repair or Service

Serving Lake Saint Louis, MO and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"Jim installed a new hot water heater (OC Smith) for us - fantastic job! No surprises with Jim, he states up front his prices and his performance and certainly with us, he kept his word - honest guy! In turn, Jim is a social guy - very easy to talk to. I would highly recommend his pricing and his work."
picture
picture
water heater installed
new stack
bathroom

+2

Response time50 mins
Recommended by96%of homeowners
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FAQs for water heater repair or service projects in Lake Saint Louis, MO

Warning signs include fluctuating water temperatures, a pilot light that repeatedly goes out, unusual noises from the tank, or complete heating failure. You might also detect a rotten egg smell, indicating a potential gas leak, or notice water that never reaches the proper temperature. If your water heater is over eight years old and displaying these symptoms, the gas valve is a likely culprit. Professional inspection is recommended, especially if gas odors are present.

Water heater gas valves are not universally interchangeable. Each valve must match your specific water heater's make, model, and specifications. Important compatibility factors include gas type (natural gas vs. propane), BTU rating, connection types, and physical dimensions. Using an incorrect valve can result in poor performance, premature failure, or dangerous gas leaks. Always consult your water heater's documentation or a professional plumber to identify the appropriate replacement valve for your unit.

The Lake Saint Louis, MO homeowners’ guide to water heater repair or services

From average costs to expert advice, get all the answers you need to get your job done.