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This is the factory OEM flame sensor with wire (part number LH680014) designed as a direct replacement for the Carrier GB3AAV036050ACJA gas furnace. The flame sensor is a critical safety component — a small rod that detects the presence of a burner flame by passing a small electrical current through it. When the sensor rod becomes coated with oxidation or carbon buildup, it can no longer verify flame presence, causing the control board to shut off the gas valve within 5 to 8 seconds of ignition as a safety precaution. The result: your furnace lights briefly, then locks out, cycling repeatedly without ever achieving a full heating call.
Compatibility: Engineered for the Carrier GB3AAV036050ACJA gas furnace. Always confirm part number LH680014 against your unit's data plate or existing sensor before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get your furnace running reliably again today.