Carmel, IN Boiler Repair—Trusted Since 1883

You raise the thermostat, but the temperature never feels consistent. Some rooms warm up, others stay noticeably cooler, and the heat seems slow or uneven. Inside the system, hot water may not be circulating evenly through all zones, often due to trapped air, an aging circulator pump, or flow restrictions. Left alone, this can put extra strain on the boiler and waste energy. We restore proper circulation so heat reaches every part of the home as intended.

You expect the boiler to start, but nothing happens or it tries and never fully kicks on. The house keeps getting colder, and basic checks like thermostat settings don’t solve it. When a boiler won’t fire, safety systems may be preventing operation because something isn’t within safe limits, including issues that could lead to carbon monoxide leaks. We address the cause and get the boiler running safely and reliably again.

The boiler sounds like it’s working, but the radiators or baseboards stay cool. That usually means heated water isn’t making it through the system. Over time, sediment buildup, stuck valves, or circulation problems can block heat from reaching the rooms you’re trying to warm. We restore proper flow so heat actually transfers from the boiler into your living spaces.

You add water to the system, watch the pressure rise, and think the issue is resolved—until it drops again. Boilers rely on stable pressure to move heat effectively, and repeated pressure loss can cause shutdowns or poor performance. This often happens when internal components aren’t holding pressure the way they should. We correct the issue so pressure remains steady and the boiler can operate normally.

If your boiler has started making banging, knocking, or gurgling sounds, it’s usually a sign something inside the system isn’t working the way it should. One common cause is kettling, which happens when mineral buildup causes water to overheat and boil inside the heat exchanger. Air trapped in the system or poor circulation can also create noise. These sounds tend to get worse over time, not better. We address the buildup or circulation issue so the boiler runs quietly again.

The boiler starts, runs briefly, and shuts down before the house warms up. You might reset the system or adjust the thermostat, but the cycle keeps repeating. When this happens, the heating system is responding to a condition that prevents it from staying on safely or efficiently. We restore steady operation so the boiler can heat the home without constant interruptions.

Thiele Heating & Air Conditioning is a locally owned and operated company that has served Central Indiana since 1883. We’re not a big, faceless franchise. We’re made up of people in the communities that we work in. We’re your neighbors, your friends, maybe even your family!

Our expert technicians bring real professional expertise to every job. Our experienced technicians are familiar with how different boilers behave. Whether you have an older unit or a newer high-efficiency model, we know how to identify what’s going wrong and get your heat working the way it should again.

Our excellent reputation and reviews across Central Indiana come from delivering consistently dependable service. We’re proud to be A+ rated with the Better Business Bureau, and people call us back because they feel taken care of, not rushed. We show up when we say we will, communicate clearly, and respect your home while we’re working.

Sometimes a boiler repair is the right call, and other times a new boiler installation is required or would be the better option. We offer financing and help you identify available rebates or promotional savings when they apply. We walk you through the pros and cons, provide upfront pricing, and never tack on hidden fees, so you can make an informed decision with confidence.

While we can handle your boiler repair today, we’re available for many more HVAC services. You can count on us in the summer for air conditioning service, and we also offer indoor air quality services so you can enjoy cleaner, healthier air at home.

A tune-up once a year makes a big difference in how long your boiler lasts and how well it runs. With our Annual “Rewards” Service Agreement Maintenance Plan, you get regular visits, faster appointments when you need them, and reduced repair costs. Enjoy the convenience and the extra time and money!

As a Bryant Authorized Dealer, Thiele Heating & Air Conditioning meets Bryant’s requirements for training, installation standards, and customer service. Our technicians are factory-trained to install and service Bryant systems, ensuring proper performance and full warranty coverage.