Furnace & Boiler Repair

  • Certified Bryant Dealer
  • 24-Hour Emergency Service
  • Furnace & Boiler Repair
  • Home & Commercial System Services

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  • Very pleased with my service

    Barb Avatar
    Barb
    11/15/2018
  • Great service. Honest

    Gary Avatar
    Gary
    3/25/2019
  • Extremely professional and trustworthy. Owner is very mindful of best way to save you money. Truly cares about doing honorable work. Would recommend them to my own mom and grandma!!

    Karen Avatar
    Karen
    4/15/2018
  • I had Jim out to my house in Fall when my furnace wasn't working correctly. Instead of gouging me for a new furnace or expensive parts (which he could have due to my lack of knowledge in this area), he found a sensor with a dead spider on it. Cleaned it off, and it runs great. Thanks again for the honesty, Jim!

    Adam Avatar
    Adam
    4/15/2018
  • This second generation family owned company provides excellent service and value. They are big enough to provide all the service and expertise of a large mechanical contractor, yet small enough to provide the personal attention, ensuring their customers are completely satisfied. I definitely recommend contacting Martens Heating and Mechanical for all your HVAC needs!

    Ted Avatar
    Ted
    4/15/2017
  • This is a great company always satisfied with service and professional staff . Would recommended them to all my friends and family . Thank you again for your timely service and the quick fix .

    Howard Avatar
    Howard
    4/15/2016
  • We had the pleasure of using Martens for our new home construction. They came highly recommended by alot of friends and clients. We couldn't be more happier then we are. We enjoyed visiting while our home was being built and the staff was always friendly and answered any questions. We were lucky to have been able to work with this company.

    Deanna Avatar
    Deanna
    4/15/2017

24/7 Emergency heating repair

Our experienced technicians are always on call and ready to help you out in a pinch. We understand that in the cold Wisconsin winters a broken furnace can feel like a dire situation. We’ll get your system up and running again in no time, assuring your home stays toasty warm through the colder months. Don't sweat a late night no heat call, we got your emergency furnace repair covered!

Full Service HVAC Heating Repair in Oshkosh, WI and Surrounding Areas

At Martens Heating we understand that in the long and cold Wisconsin winter months, your home’s heating and boiler systems are a necessity you don’t want to be without. This is why it's imperative to keep your furnace and boiler in tip-top condition. By knowing the early warning signs of a potential problem, you’ll be able to prevent larger headaches down the road. Our experienced HVAC heating system repair technicians are always ready to help you tackle any issues you may face with your furnace or boiler system. 

furnace installation

Why you should choose Martens Heating

Martens Heating and Mechanical have been serving the Oshkosh area since 1976. Our experienced technicians are fully licensed, insured, and committed to providing our customers with the best possible service and experience. We are always on call and offer free estimates, so don’t hesitate to call us today for any of your furnace or boiler repair needs!

Types of heating systems we work on

  • Forced air furnaces
  • Boilers and hydronic heating systems
  • In-floor radiant heat
boiler install

Common Heat Repair Services We Provide Include:

  • Furnace repair
  • Boiler repair service
  • 24 hour emergency repair
  • Ductwork repairs

Searching for “heating repair services near near me”? Then consider your search over. Call us today and find out why so many local residents and businesses trust us to help them with furnace and boiler issues.

Signs your heating system may be in need of a tune-up or repair

Often, your heating system will show noticeable signs it’s in need of a tune-up. Here are a few of the red flags to look out for.

Cold radiator: Sludge, corroded pipes or build-up inside your radiator can keep the hot water from flowing properly, resulting in your radiator being unable to emit heat.

Switching on and off: A problem with your boiler’s thermostat can cause it to switch on and off even when the temperature has remained the same. If you notice your boiler turning off or on at unusual intervals, it’s likely in need of a check.

Unusual sounds: A well-running heater or boiler should be fairly silent. If you notice and whistling, gurgling, banging noises, or loud vibrations, it’s best to call a repairman right away!

Lack of hot water: A lack of hot water from your boiler is often a sign of mechanical failure. If you notice a drop in the availability of hot water, it’s time to schedule a maintenance check.

An increase in your power or gas bill: A heating unit which is functioning incorrectly could leave you stuck with an unusually high gas or electric bill. If you notice a large increase in power consumption, it might be time to have a professional take a look.

Kettling: Scale buildup in the heater exchange can lead to a low rumbling sound in your boiler, this is known as kettling and is a sign that a service check is required.

Strange odors: Any unusual odors coming from your heater or furnace are a definite red flag that something is wrong. They could even be signs of a potentially dangerous gas leak and should never be ignored. 

The benefits of regular maintenance

Staying on top of regular maintenance will often greatly increase the life of your heating system, saving you from costly repairs, replacement parts, and replacement units in the future. When your HVAC system is operating correctly, you will also use less power and gas, often leading to lower utility bills. 

Furnace & Boiler FAQ's

How much will a service call cost?

My furnace is making a strange noise, but it is still heating; should I have it looked at?

What brands do you service?

I think my unit is still under manufacturer warranty; will there still be charges?