OEM Carrier Flame Sensor LH680534 / LH33WZ521 for Model PG8JEB048090AAJA

This is the genuine OEM Carrier flame sensor for the Carrier PG8JEB048090AAJA gas furnace. Part number LH680534 is the factory-authorized successor to the original LH33WZ521 and ships with a lead wire attached (LH680534 = Flame Sensor w/Lead). The flame sensor is a small but mission-critical component: it uses electrical conductivity through the burner flame to prove ignition to the control board. When the rod becomes coated with oxidation or fails entirely, the board can no longer confirm a flame is present and will shut off the gas valve within 5–8 seconds of each ignition attempt — leaving you with a furnace that lights briefly, then locks out on a no-heat fault.

• OEM Part Numbers: LH680534 (primary, w/Lead) | LH33WZ521 (superseded original) — direct factory replacement, no modifications required.
• OEM vs Generic: OEM flame sensors use factory-matched rod geometry, ceramic insulator grade, and lead wire gauge. Generic aftermarket rods often exhibit higher oxidation rates and inconsistent microamp output, leading to nuisance lockouts and premature failure — especially in high-efficiency furnaces with tight control board tolerances.
• Install Difficulty: 1/5 — One of the easiest furnace repairs. Tools needed: 1/4" hex driver or nut driver, fine steel wool or light emery cloth (to clean rod surface if desired), and a multimeter to verify microamp output post-install. Turn off power and gas before servicing. Photograph wiring before disconnecting the lead.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse when ordered by cutoff time.

Compatibility: Confirmed fitment for Carrier model PG8JEB048090AAJA and other Carrier, Bryant, and Payne furnace models sharing the LH680534 / LH33WZ521 specification. Always verify your unit's existing part number on the sensor body or your furnace's parts list before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork.