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This is the OEM factory-specified flame sensor for the Carrier PG9MAA060120AAKA gas furnace. The flame sensor (also called a flame rod) is a safety-critical component that detects the presence of a lit burner flame by passing a small DC microamp current through the flame to ground. When the control board fails to detect this signal — typically due to a corroded, cracked, or carbon-fouled sensor rod — the furnace will light briefly and then shut down within 5 to 8 seconds, triggering repeated lockout attempts with no heat delivered.
Compatibility: Designed as the direct OEM replacement for Carrier model PG9MAA060120AAKA gas furnaces. Always verify your existing part number on the sensor bracket or your unit's wiring diagram before ordering. Cross-references include LH33WZ516, LH33WZ514, and CARLH680013. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — no guesswork, no returns.