OEM Carrier Flame Sensor 90° with Mounting Bracket for Model PY3PNA048090NB

This OEM flame sensor (part #48GS400192) is the factory-specified replacement for the Carrier PY3PNA048090NB gas furnace. The flame sensor is a critical safety component that uses flame rectification to confirm the presence of a burner flame during each heating cycle. When it detects a valid flame signal, it allows the gas valve to stay open and the furnace to continue heating. A failed or carbon-fouled sensor cannot produce the required microamp signal — causing the control board to cut gas flow and lock out the furnace, typically 5 to 8 seconds after ignition. The result: a furnace that lights briefly, then shuts off repeatedly before ever reaching set temperature.

• Specs: 90° sensor rod with mounting bracket | OEM part #48GS400192 | Approximate dimensions: 4.9"(H) × 1.75"(W) × 1.6"(L) rod | Direct factory replacement — no modifications required
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory microamp tolerances. Generic flame sensors vary in rod angle, bracket geometry, and alloy composition — risking persistent lockouts or nuisance shutdowns even after installation.
• Install Difficulty: 2/5 — A straightforward single-screw R&R. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers, and a multimeter (to verify microamp draw post-install). Always disconnect power at the breaker before servicing. Tip: lightly sand the sensor rod with fine steel wool if reusing — do not use on a new OEM part.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY3PNA048090NB gas furnace. Verify your existing sensor's mounting angle (90°) and bracket style against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today. In stock and ready to ship.