OEM Carrier Flame Sensor LH33WZ520 for Model PG9MTAV60100ABSS

This is the factory-specified OEM flame sensor (part number LH33WZ520) for the Carrier PG9MTAV60100ABSS gas furnace. The flame sensor — also called a flame rod — is a safety device mounted in the burner assembly that detects the presence of a lit flame by passing a small electrical current through it. When the sensor's rod becomes coated with oxidation or carbon buildup, resistance increases and the control board can no longer confirm combustion. The result is a classic symptom: the burner ignites normally, runs for 5–8 seconds, then shuts off — repeating this lockout cycle until the unit faults out entirely. Replacing the flame sensor is one of the most common and straightforward furnace repairs.

• Specs: OEM part number LH33WZ520 | Single-rod flame sensor | Factory-matched electrical resistance characteristics | Replaces worn, corroded, or cracked sensors
• OEM vs Generic: This OEM Carrier sensor is manufactured to exact factory tolerances for current draw and rod geometry. Generic sensors may have inconsistent resistance values, causing nuisance lockouts or premature failure — OEM is always the recommended choice for reliable ignition.
• Install Difficulty: 2/5 — A straightforward repair for a qualified technician or experienced DIYer. Tools needed: 1/4" hex driver or nut driver, fine steel wool or emery cloth (to clean mounting surface), and a multimeter to verify microamp signal after installation. Always shut off gas supply and 115V power before servicing.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier PG9MTAV60100ABSS gas furnace. Always verify your existing part number on the sensor body or equipment wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping available on all in-stock OEM parts.