OEM Carrier Flame Sensor 48GS400192 for Model PY3PEA042060AA

This is the factory-original replacement flame sensor (OEM Part# 48GS400192) for the Carrier PY3PEA042060AA gas furnace. The flame sensor is a safety-critical component that uses ionization/rectification to detect a live burner flame during each heating cycle. When the burner ignites, the flame produces a small electrical signal that the sensor rod transmits to the control board, confirming safe combustion. If the board does not receive this signal within a few seconds, it shuts off the gas valve as a safety precaution. A dirty, cracked, or failed sensor is one of the most common causes of a furnace that fires up briefly and then locks out — typically within 5–8 seconds of ignition.

• Part Number: 48GS400192 | 90-degree rod configuration | Includes mounting bracket | Factory-matched signal tolerance
• OEM vs Generic: This is a genuine Carrier OEM sensor. OEM sensors are manufactured to exact rod geometry and insulator specifications, ensuring accurate microamp readings. Generic sensors may fall outside the microamp threshold required by the Carrier control board, causing nuisance lockouts even after installation.
• Install Difficulty: 2/5 — Turn off power and gas before servicing. Locate the sensor on the burner assembly, disconnect the wire lead, remove the single mounting screw, and swap in the new sensor. Lightly clean the rod with fine steel wool before installing if re-using. Tools needed: 1/4" nut driver, needle-nose pliers.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Verified fit for Carrier model PY3PEA042060AA gas furnace. Always confirm your existing part number against the unit's wiring diagram or data label before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy — reach out before you order.