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This is the factory OEM replacement flame sensor with wire harness for the Carrier PG8UAA024045ABJA packaged gas unit. The flame sensor — also called a flame rod — is a safety device that detects the presence of a burner flame by passing a small DC current through the flame itself. When the sensor becomes coated with oxidation or carbon buildup, its ability to conduct that signal degrades, causing the control board to cut the gas valve within 5–8 seconds of ignition as a safety precaution. The result: the furnace lights briefly, then shuts off and goes into lockout — often mistaken for a failed igniter or gas valve. Replacing this OEM sensor restores proper flame signal strength and reliable heat.
Compatibility: Designed as the direct OEM replacement for Carrier model PG8UAA024045ABJA. Always verify your unit's existing part number on the sensor body or wiring diagram before ordering to confirm fitment. Our team is available to verify compatibility before you buy — ships same business day.