OEM Carrier Flame Sensor LH680534 (Replaces LH33WZ521) for Model PG95XAT60100CAAA

This is the genuine OEM Carrier flame sensor with lead wire, part number LH680534, the current factory-authorized successor to the discontinued LH33WZ521. It is the direct, drop-in replacement for the Carrier PG95XAT60100CAAA 95% AFUE single-stage gas furnace. The flame sensor is a safety-critical component: a small rod that sits in the burner flame and passes a microamp signal back to the control board to confirm ignition. When the sensor becomes coated with oxidation or fails outright, the control board cannot verify flame presence and shuts the gas valve down within 5–8 seconds of ignition — causing the frustrating symptom of a furnace that lights briefly, then immediately locks out.

• Part Numbers: OEM Part # LH680534 | Supersedes discontinued # LH33WZ521 | Includes pre-attached lead wire pigtail for direct plug-in connection
• OEM vs Generic: This is a genuine Carrier factory part — not an aftermarket substitute. OEM sensors are manufactured to exact microamp tolerance specs. Aftermarket flame sensors often fall outside acceptable current range, triggering nuisance lockouts or masking a true wiring/board fault.
• Install Difficulty: 1/5 — One of the easiest furnace repairs. Turn off power and gas, remove the single 1/4" hex-head screw securing the sensor bracket, unplug the lead connector, and reverse to install. Tools: 1/4" nut driver or flathead screwdriver. Estimated time: 10–15 minutes.
• Warranty: 1-year OEM manufacturer's warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PG95XAT60100CAAA 95% AFUE gas furnace. Also fits a wide range of Carrier, Bryant, and Payne high-efficiency furnace models that originally specified LH33WZ521 or LH680534. Always verify against your unit's data plate and wiring diagram before ordering. Not sure it fits? Our parts specialists confirm fitment before you buy — call or chat today. In stock and ships today.