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

Avatar for Wagner & Sons Plumbing, LLC
Wagner & Sons Plumbing, LLC
4.8(
280
)
Water Heater - Repair or Service

Serving Cortland, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"I’ve used Mike twice now, last time for a sump pump replacement and water heater flush. Did great work and takes the time to explain what is going on. I don’t feel like he’s trying to upsell services to me like some other plumbers. Highly recommend."
Recommended by83%of homeowners
Avatar for 1st Response Plumbing & Drain, Inc.
1st Response Plumbing & Drain, Inc.
4.4(
42
)
Water Heater - Repair or Service

Serving Cortland, IL and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Great Job by Glenn getting in the new water heater and removing the old in a tight spot. Very timely, Professional , and a great value. Took the time to make sure the job was done correctly. couldn't be happier with the results. I would highly recommend Wagner Family Plumbing for all your plumbing needs!!"
Mainline Sewer Machine
Fully Stocked Trucks
Multiple Pits
Pumps
Fully Stocked Trucks

+7

Response time9 hrs
3 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for R & G Heating and Cooling
R & G Heating and Cooling
5.0(
6
)
Water Heater - Repair or Service

Serving Cortland, IL and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"Marco from R & G did an excellent job replacing the water heater at my rental property. I have called him many times for a variety of services at different locations. He is very professional, and I recommend him to anyone looking for HVAC services."
Recommended by100%of homeowners
Avatar for Windy City Rooter Inc
Windy City Rooter Inc
4.2(
73
)
Water Heater - Repair or Service

Serving Cortland, IL and surrounding areas

In business since 2001

Free estimates

Emergency services offered

"They did a fantastic job. They showed up on time and were very professional throughout the whole process. I was concerned about the project because it was a big job but they reassured me along the way and I saw first hand how efficiently and professionally coordinated the whole process. I have not had any water leaks so they successfully solved the problem!!! I would highly recommend them."
Western Springs - Leak Repair in Foundation
Western Springs - Leak Repair in Foundation
Western Springs - Leak Repair in Foundation
Recommended by94%of homeowners
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FAQs for water heater repair or service projects in Cortland, IL

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 Cortland, IL 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.