Top-rated tankless water heater repair pros.

Get matched with top tankless water heater repair pros in Cortland, IL

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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

Avatar for Four Seasons Heating & Air Conditioning
Four Seasons Heating & Air Conditioning
4.3(
3,298
)
Tankless Water Heater - Repair

Serving Cortland, IL and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"It couldn’t have gone better! Carl was experienced, knowledgeable and friendly. Plus, he smelled gas which is why he replaced the valve on my water heater. It was a great visit!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
44 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for 1st Response Plumbing & Drain, Inc.
1st Response Plumbing & Drain, Inc.
4.4(
42
)
Tankless Water Heater - Repair

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
Catenzaro & Sons Plumbing
4.3(
59
)
Tankless Water Heater - Repair

Serving Cortland, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"When Dave arrived and looked at the faucet and where it was located - he told me that it would be an additional $50 to cut a hole in the drywall which I said ok.  Then he went down to the basement to look for the water connection and he noticed that I had an old disconnected water softener.   He mentioned to me to me that I should have this water softener removed because it should be  because it potentially could cause an explosion.  Then he replaced the faucet and I asked him to give me an estimate on a 50gal new hot water heater and he did, gave me a written estimate and said that they would replace all the connections and hookups and I thought the estimate was totally fare.  Then as he was leaving, he said that he was not going to charge me for the cut into the drywall, and I was most appreciative.   He did a great job and I will definitely have him come back again.
"
Recommended by86%of homeowners
Avatar for R & G Heating and Cooling
R & G Heating and Cooling
5.0(
6
)
Tankless Water Heater - Repair

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
Service Now Home Services
4.3(
24
)
Tankless Water Heater - Repair

Serving Cortland, IL and surrounding areas

In business since 1949

Credit card accepted

Offers commercial services

"This company? Absolutely amazing. We had and emergency today with our bathroom. Toilet backed up and tub did also. 3 hours of trying to clear it, i couldnt. Even my snake didn't work. Ryan came out in a few course. Showed us the camera inside our pipes. Explained in detail where our issue was with the blockage from tree roots. He cut them out and problem resolved. Extremely professional and police. This man deserves a raise. I will DEFINITELY use them again. I see exactly why they are highly rated and recommended. I was searching for someone fast. They were the first pop up. So glad I called them. This was what was in our pipes. Ryan get it cut out pretty fast. Yes those are tree roots, not a dead animal lol But ive never dealt with a home repair company that was so polite. Yes it as a pricey repair, but the quality of work and politeness and how well he cleaned up our bathroomwhen finished, make it work every penny. Thank you again and please give him a raise. Happy New Year."
Response time1 hour
Recommended by36%of homeowners
Avatar for All Star Installations Inc
All Star Installations Inc
4.4(
58
)
Tankless Water Heater - Repair

Serving Cortland, IL and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"

couldn't have gone better, polite & hard working employees. while the tear off was going on, the material

showed up. insulation contractor started spraying in the foam. osb went down, fire &ice shield, & felt followed

by late afternoon things were cleaned up & ready for shingles to be installed the next day.

second day shingles were installed & vent flashings, when that was done final clean up was completed

to our satisfaction.


"
Recommended by93%of homeowners
Showing 1-10 of 17