Boiler Repair

Boiler Repair in Kansas City and Lenexa, KS

Boiler systems are common in Kansas City-area homes built before the 1970s, particularly in established neighborhoods of Prairie Village, Fairway, Merriam, Westwood, and Mission. These systems distribute heat through cast iron radiators, baseboard convectors, or radiant floor panels using circulated hot water or steam. They require specialized knowledge to service correctly, and not every HVAC company in Johnson County works on them.

Lutz technicians are experienced with both steam boilers and hot water (hydronic) boiler systems, including modern high-efficiency condensing units. We diagnose and repair the full range of boiler failure modes, from circulator pump failures and pressure issues to leaking sections and ignition problems. Emergency service is available 24/7 with no overtime charges.

Call (913) 631-2667 or contact us online.

Common Boiler Repair Issues in Johnson County Homes

Boiler systems fail in patterns that are distinct from forced-air furnaces. The most frequent repair calls our technicians respond to on boiler systems in the Kansas City area include:

Circulator pump failure: The circulator pump moves hot water through the distribution system. A failed pump leaves the boiler heating water it cannot distribute, often resulting in a boiler that runs but delivers no heat to the radiators. Pump failure is one of the most common boiler repairs.
Pressure issues: Boilers operate within a specific pressure range, typically 12-15 PSI for a hot water system. Low pressure can result from a waterlogged expansion tank or a slow leak in the system. High pressure can result from a faulty pressure reducing valve or a failed expansion tank. Both conditions require diagnosis before the system can operate safely.
Thermocouple and thermopile failures: Older boilers with standing pilot lights rely on a thermocouple to keep the gas valve open. A failed thermocouple causes the pilot to go out and the boiler to lock out.
Leaking sections or fittings: Cast iron boilers can develop cracks in individual sections over time. Leaks at fittings, valves, or the expansion tank are also common in older systems. The severity and location determine whether repair is practical or whether replacement is the right call.
Zone valve failures: Multi-zone hydronic systems use motorized zone valves to direct heat to individual areas. A failed zone valve can leave an entire floor or room without heat.
Ignition and control issues: Modern boilers use electronic ignition systems, control boards, and aquastats. Failures in any of these components prevent proper operation and require diagnostic equipment to isolate.

Steam Boilers vs. Hot Water Boilers

Understanding which type of boiler system your home has matters for proper repair. Steam boilers heat water to the point of producing steam, which rises through pipes to radiators where it condenses and returns to the boiler by gravity. Hot water boilers heat water to a lower temperature and circulate it through the system using a pump.

Steam systems are older, found primarily in homes built before 1940 in neighborhoods like Mission Hills, Westwood Hills, and the older sections of Prairie Village. They require careful attention to water level, pressure, and venting. Hot water systems are more common in homes from the 1940s through the 1970s and are more forgiving to service. Knowing which system type you have before calling for service helps us arrive prepared.

Repair vs. Replace: Boilers

Boilers have longer service lives than furnaces. A well-maintained cast iron boiler can last 30 to 40 years; modern high-efficiency boilers typically carry 15-to-20-year warranties on the heat exchanger. Repair is usually the right call unless the boiler is actively leaking from cracked sections, the repair cost is approaching the cost of a new unit, or the system is at an age where multiple component failures in sequence are likely.

When replacement is the right decision, modern condensing boilers offer significantly higher efficiency than the systems they replace. A mid-century boiler operating at 65-70% AFUE replaced with a high-efficiency condensing unit at 90-95% AFUE produces a meaningful reduction in heating bills. See our boiler installation page for details.

Frequently Asked Questions

My radiators are cold but the boiler is running. What is wrong?

Cold radiators with a running boiler usually indicate a circulator pump failure, a zone valve problem, or air trapped in the distribution system. On a steam system, it can also indicate a problem with the water level, pressure, or a blocked return line. These are diagnosable on a single service visit.

How do I know if I have a steam boiler or a hot water boiler?

Look at the gauge on the boiler. A steam boiler will show pressure in PSI on a steam pressure gauge, typically operating at 1-2 PSI. A hot water boiler will show water pressure, typically 12-15 PSI, and will have a circulator pump visible on the supply or return piping. Steam systems also have a glass sight gauge showing the water level in the boiler, which hot water systems do not have.

My boiler is making a banging or knocking noise. Is that serious?

On a steam system, banging (called water hammer) is caused by steam meeting water in the pipes, often due to a sloped pipe issue, a blocked return, or water level problems. On a hot water system, banging or kettle-like noises can indicate scale buildup on the heat exchanger or a failing circulator. Neither is a normal operating sound, and both warrant a service call.

How often should a boiler be serviced?

Once per year, before the heating season. Annual maintenance on a boiler system includes inspecting the heat exchanger, testing safety controls, checking the expansion tank, inspecting the circulator pump and zone valves, checking water pressure, and verifying proper venting. See our boiler maintenance page for a full breakdown.

Is it worth repairing an older boiler?

Cast iron boilers have very long service lives, and an older system in reasonable structural condition is often worth repairing rather than replacing. The key question is whether the repair addresses a single component failure or whether the system is reaching a phase where multiple components will fail in sequence. If the boiler is leaking from cracked sections or the repair estimate is high relative to a replacement, we will tell you that honestly. If a repair makes sense, we will fix it.

Does Lutz repair boilers in older Prairie Village and Fairway homes?

Yes. Older homes in Prairie Village, Fairway, Westwood, and Mission are exactly the type of residential market where boiler service expertise matters. Many of these homes have original or mid-century hydronic or steam systems that require a technician familiar with older equipment configurations. Our team is experienced with the full range of boiler system types common in the Kansas City area.

Do you offer emergency boiler repair?

Yes. Emergency service is available 24/7 with no overtime charges. Call (913) 631-2667 any time.