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Top-Rated Water heater repair or service pros in Wentzville - Updated Nov 2026

Avatar for Dunn Heating Air Conditioning and Plumbing
Dunn Heating Air Conditioning and Plumbing
4.7(
274
)
Water Heater - Repair or Service

Serving Wentzville, 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
17 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Ambassador Plumbing L.L.C
Ambassador Plumbing L.L.C
5.0(
40
)
Water Heater - Repair or Service

Serving Wentzville, MO and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Gave a bid at 8 AM and came back with a 40 Gal. water heater 2 hrs. later. Did the work and my renter had hot water in about 35 minutes. Good job. They have got my business. Thanks."
Response time1 day
Response rate100%
Recommended by90%of homeowners
Avatar for Go Time Plumbing Services
Go Time Plumbing Services
4.8(
46
)
Water Heater - Repair or Service

Serving Wentzville, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Warranties offered

"Wonderful customer service! Came early on a Sunday to look at hot water heater. Replacement installed on Monday in a couple of hours tops. Will definitely be using again for all our future plumbing needs."
Response time6 hrs
Response rate100%
112 neighbors recently requested a quote
Avatar for On Time Experts
On Time Experts
4.8(
104
)
Water Heater - Repair or Service

Serving Wentzville, 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 Mr. Rooter Plumbing of St. Charles
Mr. Rooter Plumbing of St. Charles
4.2(
340
)
Water Heater - Repair or Service

Serving Wentzville, MO and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Noah did a wonderful job explaining what was wrong with my water heater. I appreciated him reviewing all about the new water heater. A very pleasant experience."
Mr. Rooter of St. Louis
Mr. Rooter of St. Louis
Mr. Rooter of St. Louis
Mr. Rooter of St. Louis
Mr. Rooter of St. Louis

+7

Response time6 hrs
36 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Winnovation Plumbing and Drain
Winnovation Plumbing and Drain
5.0(
7
)
Water Heater - Repair or Service

Serving Wentzville, MO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

Winnovations Plumbing is a local, family-owned plumbing company proudly rooted in St. Louis. For more than a decade, we’ve been the neighborhood plumbers you can trust, built on a family legacy of quality craftsmanship and dedicated service.\n‍\nOur history began with a simple mission: to carry on a tradition of reliable plumbing work inspired by our founder’s father, an experienced plumber. Today, we remain committed to helping our community with honest solutions for every job, whether a small repair or a larger project. \n‍\nWe are more than just a plumbing service we’re part of the fabric of St. Louis. We support local families, focus on clear communication, and treat every home with respect and care. Plumbing issues can be stressful, so we emphasize transparency, timely service, and building long-term relationships with our customers.

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 Wentzville, 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.

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FAQs for water heater repair or service projects in Wentzville, 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 Wentzville, 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.