OEM Carrier Flame Sensor (48GS400192) for Model PY2PNB024040AC

This is the genuine OEM Carrier flame sensor, part number 48GS400192, factory-specified for the Carrier PY2PNB024040AC gas furnace. The flame sensor is a critical safety component — it uses ionization/rectification technology to detect the presence of a burner flame and sends a microamp signal to the control board confirming ignition. When the sensor fails or becomes coated with oxidation, the furnace will light briefly and then shut off after 5–8 seconds, often triggering a fault lockout code. Replacing the flame sensor is one of the most common and cost-effective furnace repairs available.

• Specs: 90° angle mounting configuration | Includes factory mounting bracket | OEM part number 48GS400192 | Approximate rod length 1.6" | Overall dimensions approx. 4.9" × 1.75"
• OEM vs Generic: This is a genuine Carrier OEM sensor, manufactured to exact factory tolerances for microamp output and rod geometry. Generic sensors may produce inconsistent microamp readings, causing nuisance lockouts or premature control board wear.
• Install Difficulty: 2/5 — Power down and lock out the furnace before beginning. Tools needed: 1/4" or 5/16" nut driver, flathead screwdriver, fine steel wool or light sandpaper to clean burner bracket if needed. Disconnect the single wire connector, remove the mounting screw, swap the sensor, and reconnect. Job typically takes under 15 minutes.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY2PNB024040AC gas furnace. Always verify the part number on your existing sensor or equipment data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required. In stock and ready to ship today.