OEM Carrier Flame Sensor 48GS400192 for Model PY2PNB048115AA

This is the factory OEM replacement flame sensor (part number 48GS400192) for the Carrier PY2PNB048115AA packaged unit. The flame sensor is a critical safety and combustion-proving component — it generates a small microamp current when bathed in the burner flame, signaling the control board that ignition has been successfully established. When the sensor fails or becomes coated with oxidation, the control board cannot confirm a live flame and will shut off the gas valve within 5 to 8 seconds of ignition as a safety lockout. The result: your unit lights briefly, then shuts down, and you are left with no heat.

• Specs: OEM part number 48GS400192 | Single-rod flame-sensing design | Factory-matched microamp output | Gasket seal included
• OEM vs Generic: This OEM sensor is manufactured to exact Carrier tolerances for microamp output and rod geometry. Aftermarket sensors can produce out-of-range microamp readings, causing nuisance lockouts or, worse, failing to shut off the gas in a true no-flame condition.
• Install Difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" hex driver or nut driver, fine steel wool or emery cloth (to lightly clean rod if reusing), and a multimeter capable of reading microamps to verify operation. Photograph existing wiring before disconnecting.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PY2PNB048115AA. Always confirm the part number on your existing sensor or unit data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy if you have any questions. Order today for same-day shipping.