Heating failures in Centennial homes follow predictable patterns depending on system type and age. Furnaces lose igniter function, develop cracked heat exchangers, or have control board failures. Heat pumps develop refrigerant leaks, reversing valve failures, or defrost cycle issues. Boilers develop pressure issues, zone valve failures, and circulation pump problems. Each of these requires different diagnostic steps and different repairs, and a correct diagnosis upfront is what separates a fix that holds from one that fails again next month.

For heating systems that are past repair, our heating replacement team handles full system swaps. For furnace-specific issues, our furnace service covers repair, tune-up, and replacement for gas and electric furnaces. See all Centennial HVAC services we offer.

• Furnace not starting traced to igniter failure, gas valve issues, control board faults, or safety switch trips that are preventing the furnace from firing.
• Furnace running but not heating diagnosed to find whether the issue is a heat exchanger problem, a blower motor failure, or a gas pressure issue affecting combustion.
• Heat pump not heating evaluated for refrigerant charge, reversing valve function, defrost cycle operation, and outdoor unit condition.
• Boiler repair for pressure loss, zone valve failure, circulation pump issues, and thermocouple or control problems in hot water and steam systems.
• Short cycling heating systems that turn on and off rapidly without completing a full heating cycle, often caused by a dirty filter, overheating limit switch trips, or a system that is oversized for the space.

Here are the heating repair calls our Centennial technicians handle most often.

Why Is My Furnace Running but Not Heating My Centennial Home?

A furnace that runs but does not produce heat has a few common causes. A cracked heat exchanger allows combustion gases to mix with heated air and trips the system’s safety controls, causing the blower to run without heat. A failed gas valve prevents gas from reaching the burner even when the igniter fires. A blower motor that is running in fan-only mode due to a control board fault circulates air without the heat exchanger firing. Overheating due to a clogged filter can also cause the high-limit switch to shut off the burner while the blower continues running.

WireNut technicians work through the diagnostic systematically to identify the actual cause, explain what they found, and give you the repair cost before touching anything. In Centennial homes where furnaces have been running for 20 or more years, component failures like these are normal aging events, but they need to be diagnosed correctly to fix correctly.

What Should I Do If My Heat Goes Out in Centennial During Winter?

Check the thermostat first to confirm it is set to heat and the temperature is set above the current room temperature. Check the furnace filter, as a severely clogged filter can trigger the high-limit switch and shut the system down. Check the furnace’s circuit breaker and confirm the furnace power switch is on. If all of these check out and the system still will not run, call WireNut for same-day heating repair service. Do not attempt to bypass safety switches or investigate the heat exchanger yourself.

For Centennial homeowners without heat during a cold snap, WireNut prioritizes heating emergency calls and will get a technician to your home as quickly as possible.