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Best boiler repair pros near Appleton, WI

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TRUSTED BY APPLETON, WI HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon862
    Verified boiler repairs reviews

Top-Rated Boiler repair pros in Appleton - Updated Nov 2026

Avatar for Healthy Home Heating And Cooling
Healthy Home Heating And Cooling
4.6(
39
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Appleton, WI and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Woke up to a terrible sound coming from my furnace.  Called Healthy Home at about 8am and they said someone was finishing up a job and would be there in approximately one hour.  At about 9am, Scott showed up at my house.  I explained the issue to Scott and he quickly went to work and determined the blower motor wheel needed to be replaced.  Scott was able to find the part in town and have my furnace back up and running better than before all before 11am!  Scott was very professional and showed me and explained everything that he was doing.  Scott went over the different options and prices before moving ahead with the work and I never felt pressured or rushed to make a decision.  This is the first time I have needed HVAC work at this house and I know that my furnace will need replacing in the coming years.  I will definitely call Healthy Home back for additional service and to talk about my replacement options.
"
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+1

Response time11 hrs
2 neighbors recently requested a quote
Recommended by97%of homeowners
Conradt Quality Air LLC
4.3(
4
)
Gas Boiler or Radiator Heating System - RepairGas Boiler or Radiator Heating System - Repair - For Business

Serving Appleton, WI and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

With more than 3 years of experience, Conradt Quality Air LLC is dedicated to providing our customers with the best quality at a great price. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you! \n

Response time10 hrs
1 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for North Alabama Technical Services
North Alabama Technical Services
4.9(
124
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Appleton, WI and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"Mr. Ferrell first connected his computer to my computer via internet and worked for quite a few hours trying to determine what exactly was wrong. The next day he continued working from his computer for several hours. He determined he would have to have my desktop tower to complete the repair. He and my son met in Huntsville to exchange the tower. He then cleaned up a lot of what was wrong and reloaded Windows 10. He deleted the D: drive which had way too much memory allotted to it. The tower was returned and I plugged it all back together and it is working better than it did when I first purchased it. I would use him again and I recommend him highly to anyone needing computer updating and/or repair. His work is warrantied and he is very personable, knowledgeable, and helpful."
2014 Super Service Award Winner!
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Recommended by97%of homeowners
Avatar for Sears Home Improvement Products
Sears Home Improvement Products
3.7(
1,712
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Appleton, WI and surrounding areas

In business since 1886

Free estimates

Credit card accepted

"I would say extremely good to not so good depending who comes to work. We had a problem with the dishwasher one time and a guy came to fix it. He looked at it and said it was fixed then he left but actually it wasn't fixed. Another guy came again and he said it wasn't fixed because they never replaced a certain part so when he replaced that part, everything was fine. The responsiveness is pretty good. Professionalism is excellent. They were polite and knew what they're doing except for that one guy only."
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Recommended by74%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+13 more

Serving Appleton, WI and surrounding areas

In business since 1971

Credit card accepted

"The technician did an excellent job. It did take a while to get the repair finished, but that was due to Bertazzoni delivering the parts. I have had multiple problems with this particular appliance. My range now works better than it did when new, but I have a feeling that even if I have continuing problems with it, American Home Shield will just repair rather than replace due to the cost of the range. By the way, I'm not exactly sure of the date of the repair."
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+2

Recommended by65%of homeowners
Jack Kiefer Heating and Air, LLC
4.6(
10
)
Gas Boiler or Radiator Heating System - Install

Serving Appleton, WI and surrounding areas

In business since 2019

Free estimates

Offers commercial services

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Recommended by100%of homeowners
Abbys Heating & AC, LLC
5.0(
2
)
Gas Boiler or Radiator Heating System - Install

Serving Appleton, WI and surrounding areas

In business since 2004

Free estimates

Credit card accepted

It can be a daunting task looking for not only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We're not only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.

Response time3 hrs
Recommended by100%of homeowners
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Boiler Repair FAQs, answered by experts

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

There are a couple of signs that will tell you it’s time to bleed the radiator. If the radiator is making noises, it’s typically because of trapped air, which you can release by bleeding the radiator. You can also test the radiator by turning on your heat and then placing your hand near the top and bottom of the radiator. If you feel cold spots, particularly at the top of the radiator, it’s time to bleed it.

If your boiler is 20 years old, it’s time to get a new one. Although it may seem to be working fine, it’s likely eating up more fuel than it should. Also, compared to a brand-new boiler, one that’s 20 years old is probably not working as well. When you get your new unit, you’ll notice that your home is heating more quickly, and the heat is consistent throughout all the rooms.

Boilers are equipped with multiple safety features to ensure safe operation. These include pressure relief valves to prevent overpressure, temperature high-limit switches to avoid overheating, and flame failure safety devices in gas boilers to cut off the gas supply if the flame goes out unexpectedly. Low water cutoffs prevent operation with insufficient water levels, and pressure gauges help monitor pressure levels. Ventilation and flue systems prevent the buildup of harmful gasses. Boilers often feature error code systems for automatic shutdown during malfunctions and gas leak detection for safety. Regular maintenance is crucial to ensure these safety features function correctly.

If you go to turn it counterclockwise and it won’t turn anymore, it’s open. Like most other valves, you should be able to turn a radiator valve counterclockwise (to the left) to open it and clockwise (right) to close it. To close a radiator valve, turn it clockwise until you meet some resistance and can’t turn anymore, but do so carefully to avoid breaking the valve.

The Appleton, WI homeowners’ guide to boiler repairs

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