OEM Carrier Flame Sensor (48GS400192) for Model PY3PPA048090NB

This is the genuine OEM Carrier flame sensor, part number 48GS400192, factory-specified for the Carrier PY3PPA048090NB gas furnace. The flame sensor is a safety-critical component that uses ionization/rectification to detect the presence of a burner flame during each heating cycle. When functioning correctly, it allows the gas valve to stay open and the furnace to run. When the sensor rod becomes coated with oxidation or fails entirely, the furnace will light briefly — then shut down within 5 to 8 seconds, triggering a lockout fault. This is one of the most common causes of a no-heat call in gas furnaces.

• Specs: 90-degree mounting angle | Compact rod-style flame sensor with mounting bracket | Approx. 4.9" H × 1.75" W × 1.6" rod length | OEM part number 48GS400192
• OEM vs Generic: This is a genuine Carrier OEM part — not an aftermarket substitute. OEM sensors are manufactured to exact factory tolerances for signal sensitivity and rod metallurgy, ensuring reliable flame detection and preventing nuisance lockouts caused by undersized or poorly matched aftermarket rods.
• Install Difficulty: 2/5 — A straightforward repair for most homeowners. Tools needed: 1/4" nut driver or 5/16" socket, fine steel wool or emery cloth (to clean rod if reinstalling old sensor), and a multimeter (optional, for diagnosis). Always shut off power and gas before servicing. The sensor typically mounts to the burner manifold with a single screw and connects to one wire lead.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PPA048090NB gas furnace. Verify your unit's part number against the data plate inside the furnace cabinet before ordering. If you have questions about fitment, our HVAC parts specialists are available to confirm compatibility before you buy. Order now and your part ships today.