OEM Carrier Flame Sensor LH33WZ520 for Model PG9YAA060100ACSS

This is the genuine OEM flame sensor (part number LH33WZ520) factory-specified for the Carrier PG9YAA060100ACSS gas furnace. The flame sensor is a small but critical safety component — a metal rod that sits in the burner flame and passes a small electrical current to the control board to confirm combustion. When it fails or becomes coated with oxidation, the board cannot verify a flame is present and will shut off the gas valve as a safety measure, typically within 5 to 8 seconds of ignition.

• Symptom: Furnace ignites and runs briefly, then shuts off — repeating 2–3 times before locking out. Error code typically indicates "flame sense fault" or repeated ignition failure.
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory tolerances for rod geometry, ceramic insulator rating, and bracket angle. Generic sensors may have incorrect rod length or bracket fit, causing nuisance lockouts or improper flame sensing.
• Install Difficulty: 2/5 — Tools needed: 1/4" hex nut driver, needle-nose pliers, fine steel wool or emery cloth (to clean rod if reusing). Always shut off gas and power to the furnace before servicing. The sensor is typically held by a single screw near the burner assembly.
• Warranty: Backed by a 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier PG9YAA060100ACSS gas furnace. Also compatible with several Carrier, Bryant, and Payne furnace models using OEM part number LH33WZ520 — verify your data plate before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.