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Top-Rated Water heater pros in Warren - Updated Nov 2026

Avatar for Harker Heating & Cooling
Harker Heating & Cooling
4.6(
213
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Warren, IL and surrounding areas

In business since 1949

Free estimates

Emergency services offered

"

We had our water heater go out last week.  We noticed it when we woke up to take showers before work.  I called a few places and ultimately chose to go with Harker because the receptionist told me they would be able to come out and assess the heater and replace it the same day.  Our water heater is about 7 years old, so we figured there would be a good chance that it would cost the same amount the replace the water heater as to just fix the older one, so that is why I verified with her that they could fix it the same day.

 

We have a new rescue dog that is not good around men, so my SO came home from work (I had already taken the day off work for this) and she took the dog away from the house so we didn?t disturb the men while they worked.  As we expected, there were a few parts that were bad on the water heater and the cost would be similar to repair or to replace.  He was done looking at the water around 2:00 and he told me someone would call me for a quote.  I was confused as I was under the impression that they would replace it that same day per the lady on the phone.  Apparently, that was not the case.  This guy wasn?t even the guy who would replace the unit, the guy who would replace the unit was busy and they didn?t have a replacement unit. I was very frustrated and mad?I chose Harker because I was told they could do it all in one day or we both wouldn?t have taken off work.  I could have just let my dog outside for a little while for him to look at the water heater.  I paid roughly $120 for this diagnostic test.

 

We then called to speak with a manager at Harker.  They tried to get someone to come back out that night and replace the water heater but were unable to.  They did have someone sent out first thing the next morning and took about $50 off the service call, which was appreciated but didn?t cover the amount of money we lost at work for missing part of both days.  This all could have been avoided by having their receptionist give accurate information.  There are a ton of places in Madison I could have called to have my water heater replaced and I chose Harker because I was told they could do it that same day and if they couldn't have replaced it that day, they should have said so and I would have made other arrangements. 



Update to Harkers repsonse:

At no time did they ever offer to have the heater replaced that evening for overtime rate or we would have easily paid it instead of taking more time off work.  We were told that they could try to get someone out that night but were unable to.  The only reason we okay'd them to come back the next morning is we needed it replaced as soon as possible.  We did not call later in the day-- it was still in the morning when we called.  And, obviously we know that you cannot carry all kinds of equipment around with you, but I was told that it would be replaced that night, so that is the fault of your receptionist to give me misinformation. They will try to write this so they sound like this was our fault for not knowing that they don't carry all the equipment, need licensed plumbers, etc., but we know exactly what was told to us on the phone and exactly how the situationw as handled and it was handled poorly.  We stand by our original reivew and will choose to use another company in the future. 


"
87 W. Beltline Hwy
Carrier Distinguished Dealer Logo
Star of Madison Award
Recommended by89%of homeowners
Avatar for Rardin Plumbing Heating & A/C
Rardin Plumbing Heating & A/C
4.6(
11
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Warren, IL and surrounding areas

Free estimates

Emergency services offered

Credit card accepted

"Excellent service.  Oscar and his crew go far and above what is necessary to fix or replace plumbing.  They are very conscientious, courteous and respectful.  They are also very considerate of your property, taking measures to insure that floors are kept clean and all debris is removed when they leave.  I will hire Rardin Plumbing and Heating again, and I highly recommend them.
"
Recommended by100%of homeowners
Avatar for McDonagh & Sons Plumbing & Sewer Inc
McDonagh & Sons Plumbing & Sewer Inc
4.1(
69
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Warren, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"I own a two flat in the city. Today i got a call from one of my tenants telling me that there was a leak. i called mcDonoagh and Sons and within two hours, they ha a Technician come out on st Patrick's day diagnose the problem, get the appropriate parts and fix it. I was very impressed with the responsiveness and the speed of service. He also made helpful recommendations for how to maintain my water heaters.
"
Recommended by96%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Warren, IL and surrounding areas

In business since 1971

Credit card accepted

"We pay yearly but we have this is included with our rental property. They are pretty good on most things. We had a hot water heater replaced and they did an excellent job on that. They are very quick on their response. They dont come out here. It is all done on the internet.  I just like the idea that one time service charge is so much better than trying to hiring someone to come in. It is more about convenience. It pays for itself."
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Recommended by65%of homeowners
Avatar for Green Earth Enterprises Inc
Green Earth Enterprises Inc
4.7(
7
)
Solar Water Heater System - InstallTankless Water Heater - InstallTankless Water Heater - Install - For Business+6 more

Serving Warren, IL and surrounding areas

In business since 2009

Free estimates

Emergency services offered

We’re here to change your perceptions of what it means to be a property owner in today’s fast paced marketplace. Whether you are a landowner with rental property, or if you would like to “flip” a property you've just purchased or maybe you're a Realty Management Company seeking to prepare your managed property for the market or simply the next tenant. We're here to help you meet your needs in an affordable & efficient manner. We offer a wide array of services to choose from in whole or in part, as it fits your needs & budget. We look forward to doing business with you! Additional Emails - [email protected], [email protected], [email protected]. Additional Address - Princeton, IL 61356.

Recommended by71%of homeowners
Water Heaters FAQs, answered by experts

There are pros and cons to tankless water heaters. They are more efficient than traditional tank water heaters, and maintenance costs are lower. These units are also much more compact. On the other hand, they cost about twice as much to install as traditional tank water heaters and are more limited in terms of flow rate.

While not all homes require a hot water heater expansion tank, they are necessary in most newer homes and are often mandated by local building codes. Codes typically require an expansion tank if your plumbing system is a 'closed-loop' system, which often includes a backflow preventer or pressure regulator on the main water line. Some municipalities have specific requirements. Installing an expansion tank on a closed system is crucial, as it prevents excess pressure that can damage your water heater and other appliances, potentially shortening their lifespan. However, tankless water heaters do not require an expansion tank.

Tankless water heaters heat water as it passes through the unit instead of storing heated water in the tank. Their ability to produce hot water on an as-needed basis makes them more efficient. However, they are generally more expensive than traditional units. Is a tankless water heater worth it? Most homeowners will save money with a tankless unit in the long run by using less energy.

Professional installs conclude in mere hours, with complexity differences possibly prolonging efforts slightly. Site condition often dictates the exact duration.

Basements, specifically those without any air conditioning, are the best location for a hybrid water heater. These rooms are less likely to experience extreme temperature fluctuations, which can affect your hybrid water heater’s efficiency and performance. Basements often have more than enough space for their tanks and proper air circulation. Hybrid water heaters can also be a bit noisy, but putting them in your basement will keep the noise away from your main living areas.

The Warren, IL homeowners’ guide to water heater services

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