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This is the genuine OEM Carrier flame sensor assembly (part number LH33WZ005), the factory-specified replacement for the Carrier PY1PEA060100AEBA packaged unit. The flame sensor — also called a flame rod — monitors the burner flame via the principle of flame rectification, sending a small microamp signal to the control board to confirm combustion is present. When the sensor fails or its rod becomes coated with oxidation, the control board cannot verify the flame and shuts off the gas valve as a safety measure, typically 5 to 8 seconds after ignition. The result: the system lights briefly, then shuts down and locks out — a telltale sign of a dirty or failed flame sensor.
Compatibility: Direct OEM replacement for the Carrier PY1PEA060100AEBA packaged unit. Verify your existing part number on the sensor body or equipment wiring diagram before ordering. Our fitment specialists are available to confirm compatibility before you buy — no guesswork required.