OEM Carrier 90° Flame Sensor (48GS400192) for Model PY3PPA048090NA

This is the genuine OEM Carrier flame sensor, part number 48GS400192, factory-specified for the Carrier PY3PPA048090NA gas furnace. The flame sensor — also called a flame rod — is a critical safety component that uses ionization/rectification technology to verify that a burner flame is present during each heating cycle. When the sensor detects no flame signal (or a degraded signal due to oxidation or carbon buildup), the furnace control board initiates a safety lockout, shutting the system down to prevent unburned gas accumulation. A failing flame sensor is one of the most common causes of a furnace that lights briefly and then shuts off after just 5 to 8 seconds.

• Specs: 90° rod angle with factory mounting bracket | Flame rod length approx. 1.6 in. | Overall dimensions approx. 4.9 in. × 1.75 in. | Single-wire connection | OEM part #48GS400192
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory tolerances for rod alloy composition and geometry. Generic flame sensors may exhibit inconsistent microamp output, causing nuisance lockouts or premature failure — especially in high-efficiency condensing furnaces with sensitive control boards.
• Install Difficulty: 2/5 — A straightforward repair for most DIYers with basic tools. Turn off power and gas before beginning. Tools needed: 1/4 in. hex driver or flat-head screwdriver, needle-nose pliers, and a multimeter (to verify microamp output post-install). Always confirm the new sensor's rod is clean and free of contaminants before firing.
• Warranty: Backed by a 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as the direct factory replacement for the Carrier PY3PPA048090NA gas furnace. Always verify your existing part number on the sensor body or your unit's wiring diagram before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork required.