Tankless Water Heater Repair

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Tankless Water Heater Repair

Tankless Repair Service You can Count On

At Paragon Mechanical, Inc. we take tremendous pride in being proven experts in the area of tankless water heaters. Our team of well-respected technicians and installers are unsurpassed in their training and their craftsmanship when it comes to installation and tankless repair. What truly sets our team apart is that we actually enjoy the challenges of repairing water heaters and committed to your complete satisfaction. To better serve you, we have over 500 tankless heater parts on our truck and over 5,000 in stock. We are prepared to fix your water heater quickly and accurately every time.

We Provide Tankless Repair for All Major Brands

Our technicians are well-trained in all major tankless water heater brands including Noritz, Takagi, A.O. Smith, Navien, Rinnai, Bradford White, Eternal, State, Rheem, Rinnai, Intellihot, and trutankless.

Tankless Heater Training Makes the Difference

The industry of tankless water heaters is continually changing at a rapid pace. The innovative changes in gas valve function to heater designs alone are unequaled. At Paragon, we pay meticulous attention to all the advances in technology and provide countless hours on ongoing training to our employee partners. Our technicians have logged over 5,689 training hours to date. This, of course, leads to better performance when out servicing our valued customers.

The secret to fast response time when repairing your tankless water heater? Have an exemplary team of service technicians who will always arrive on time, quickly assess your problem, and dedicate themselves to providing a reliable and accurate solution. We are proud of our response time record and continually are working toward improvement.

Tankless Service Done Right

The truth behind Paragon’s success is our team of tankless repair technicians. They are trained on all major brands and stay abreast of industry updates. They are passionate abut resolving your tankless water heater issues. So much so, they won’t rest until you are pleased with the results. From incorrectly installed new equipment, no water coming out of the faucet, or hot water only coming out warm at best, our technicians have seen it all. With over 23,345 tankless water heater problems resolved, we have the experience and expertise you deserve. Call Paragon Mechanical, Inc. for all your tankless water heater repairs 847-321-9428.

Common Problems

Newly Installed Equipment Malfunction

There are many service calls in which we receive for recently installed hot water heating equipment that is not working as expected. Most of these service calls are a result of poor installation of the newly installed hot water heating equipment.

If this problem is corrected early enough the life of the equipment could possibly not be negatively affected. At Paragon Mechanical we prides ourselves on expert installation of hot water heating equipment for each and every installation. See our domestic hot water installation services for more detail.

No Water Coming Out of Faucet

In our Chicago climate we experience extremely cold weather that can occasionally cause a main water line or incorrectly installed tankless water heater to freeze and prevent water from flowing.

If this is the case then try to find the place which your pipe or tankless heater is frozen and thaw as soon as possible to prevent the pipe from bursting. You can typically thaw a pipe by using a hair dryer however if your not comfortable feel free to call a trained Paragon professional to correct this problem for you correctly and promptly.

Hot Water is Not Hot and Warm at Best

For a tankless system, it is vital that the water flowing through the hot line comes from only the tankless water heater. If you have a system mixing valve, shower valve, shower cartridge, or sink valve in the house bleeding water through the valve and into the hot line, this may result in lukewarm or cold water at all or specific fixtures or throughout the house.

Unfortunately, loss of hot water can also be symptomatic of a problem with the tankless heater itself, so as a homeowner, knowing who to call can become confusing, and hiring multiple contractors might be unavoidable.

Because most plumbers are unfamiliar with tankless water heaters, we always recommend starting by having a Paragon technician out to ensure the tankless water heater is operating as expected. By ruling out the tankless water heater as the source of the problem, we can then move to see if there is a system mixing valve bleeding water through, or inform you of any potential problems with your plumbing system. (shower valve, shower cartridge, sink valves)

As a mechanical contractor, Paragon is able to fix any problems caused by the tankless devices themselves, and any problems with the tankless system as a whole. (mixing valves, return lines, etc.) If a Paragon technician rules out the tankless system as the cause of the problem, you may need to also contact a dedicated plumber to diagnose specific problems with your showers and/or sinks.

Customer Experiences

“These guys are all great they know my tankless heater and was able to fix it right away”

John H.
Arlington Heights, IL

“My tankless heater was leaking and three companies told me I had to replace it I called paragon and they were able to fix it and within 24 hours. I couldn’t be more happy with this company”

Bill F.
Palatine, IL

“Chris was great he fixed our heater within the first hour I couldn’t be more happy.”

Kim P.
Skokie, IL

“After being told by another company that I needed to replace my tankless heater I decided to call another company, Paragon Mechanical, Inc. Scott came and investigated the situation and was able to fix the unit and get it running.”

Stephanie H.
Arlington Heights, IL

“Chris did a great job he fixed my tankless heater and eliminated the problem with noise after being told by another company that noise is normal.”

Robert M.
Arlington Heights, IL

“Chris is very knowledagble about tankless heaters. In the short time he was here fixing my tankless heater he explained the complete operation of the unit and know I understand the product better then ever.”

Dan B.
Lake Forest, IL

“Paragon came out and resolved the problems we had with our tankless heater right away without fail I would use them again.”

Kevin L.
Deerfield, IL

“Paragon Mechanical is the best company i’ve ever used. The guy who answered the phone was awesome and the technician was really great. He explained everything to me and worked quickly to solve the tankless water heater problem I was having.”

John D.
Chicago, IL

“These guys arrive faster than Jimmy Johns!”

Mickey H.
Northbrook, IL

“I have never been so happy with a contracting company; they were on-time, very clean and neat and delivered everything that was promised.”

John D.
Itasca, IL

Expertise & Availability


Tankless Problems Fixed


Tankless Training Hours


Repeat Customers


Tankless Parts on Truck


Tankless Parts in Stock


Tankless Part Availability

Dispatch Locations

  • Arlington Heights, IL
  • Elmhurst, IL
  • Hinsdale, IL
  • Naperville, IL
  • Oak Park, IL
  • Lincoln Park, Chicago
  • Northbrook, IL
  • Glenview, IL
  • Winnetka, IL
  • Highland Park, IL
  • Lakeforest, IL
  • Barrington, IL

Manufacturers Serviced

AO Smith
Eternal – Advanced Hydrid Water Heating
Bradford White
State Water Heaters