OEM Carrier Flame Sensor LH680534 (Replaces LH33WZ521) for Model PG92SBS66120DBAA

This is the genuine OEM Carrier flame sensor — part number LH680534 (with lead/pigtail) — and the current factory-authorized replacement for the superseded LH33WZ521. It is the direct-fit flame sensing rod for the Carrier PG92SBS66120DBAA 92% AFUE single-stage gas furnace. The flame sensor is a safety-critical component: it passes a small electrical current through the burner flame to verify ignition. If the sensor is fouled, corroded, or failed, the furnace control board will cut gas flow within 5–8 seconds of burner light-off, causing the unit to lock out and short-cycle — leaving you without heat.

• OEM Part Numbers: LH680534 (current, with lead) | LH33WZ521 (superseded/obsolete) — This listing ships the current production LH680534 only.
• OEM vs Generic: This is a genuine Carrier factory part, not an aftermarket copy. OEM sensors are precision-matched to the control board's microamp detection threshold. Generic sensors can read outside spec, causing nuisance lockouts or — worse — delayed fault detection.
• Install Difficulty: 2/5 — Turn off gas and power before servicing. Tools needed: 1/4" hex driver or nut driver, fine steel wool or emery cloth (for rod cleaning confirmation), multimeter (for microamp verification). Disconnect the single-terminal lead, remove the mounting screw, swap the rod, reconnect. 15–20 minutes typical.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Confirmed fitment for Carrier PG92SBS66120DBAA gas furnaces. Also fits select Carrier, Bryant, and Payne furnace models — verify your unit's data plate and existing part number before ordering. Our fitment team is available to confirm compatibility before you buy.