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This OEM flame sensor with wire (part number LH680014) is the factory-specified replacement for the Carrier PG8JAA036110ACJA packaged gas furnace. The flame sensor is a safety device — a metal rod that confirms the presence of a burner flame by passing a small microamp current through it to the control board. When it becomes coated with oxidation or carbon buildup, or when it fails entirely, the furnace will light briefly and then shut down within 5–8 seconds, triggering a lockout condition. This is one of the most common causes of a furnace that "ignites but won't stay on."
Compatibility: Engineered for the Carrier model PG8JAA036110ACJA packaged gas furnace. Verify your unit's existing flame sensor mounting configuration and wire harness connector before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork.