Clients need fast diagnosis during cold weather with honest assessment of whether a cracked heat exchanger warrants repair or full system replacement.
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What clients expect and what professionals need to know
Heating repair diagnoses and fixes furnace ignition failures (hot surface ignitors, standing pilot outages), failed induced draft motors, cracked heat exchangers (a CO safety issue requiring immediate shutdown), dirty flame sensors causing intermittent lockouts, and failed pressure switches. Technicians use a combustion analyzer to verify safe CO levels in flue gas and a manometer to measure gas valve pressure. Heat exchanger cracks are confirmed with a CO detector in the airstream.
Clients need fast diagnosis during cold weather with honest assessment of whether a cracked heat exchanger warrants repair or full system replacement.
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Common questions from clients looking for Heating System Repair services
A dirty flame sensor is the most common cause — the sensor detects the flame electrically, and carbon buildup prevents proper sensing, causing the control board to shut down the gas valve.
The heat exchanger separates combustion gases from circulated air; a crack allows CO and combustion gases to enter the airstream — causing carbon monoxide poisoning in the home.
The high-limit switch has tripped due to overheating (caused by dirty filter, closed vents, or a failed blower motor) — the gas shuts off but the blower keeps running, delivering cold air.
Oversized systems cool the heat exchanger quickly and satisfy the thermostat before completing a full cycle; dirty filters, closed vents, or a failed limit switch also cause short-cycling.
Annual fall tune-up includes cleaning the heat exchanger, checking the heat exchanger for cracks, testing the gas valve, cleaning the burners, and verifying combustion safety — extends system life and maintains efficiency.
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