OEM Carrier Flame Sensor (48GS400192) for Model PY3PNA036090NB

This OEM Carrier flame sensor is the factory-specified replacement for the Carrier PY3PNA036090NB gas furnace. The flame sensor — also called a flame rod — uses ionization (flame rectification) to detect whether a burner flame is actually present after ignition. When the sensor is dirty or failed, the furnace control board receives no confirmation signal and shuts the gas valve within 5–8 seconds as a safety measure. The result: your furnace lights, runs briefly, then shuts off repeatedly — often triggering a lockout fault code. Replacing this low-cost component is one of the most common and cost-effective furnace repairs available.

• Specs: 90° flame rod configuration | Includes factory mounting bracket | Approx. rod length 1.6" | Overall dimensions approx. 4.9" × 1.75" | OEM Part # 48GS400192
• OEM vs Generic: This is a genuine Carrier OEM part, factory-matched for the PY3PNA036090NB. Generic sensors can vary in rod geometry and bracket alignment, causing intermittent detection errors and nuisance lockouts — even when brand new.
• Install Difficulty: 2/5 — A straightforward repair for most homeowners. Tools needed: Phillips screwdriver, 1/4" nut driver, fine steel wool or emery cloth (to clean rod if reusing). Always shut off power and gas before servicing. Locate the sensor near the burner assembly, disconnect the single wire lead, unbolt the old sensor, and reverse to install.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PY3PNA036090NB. Verify your unit's existing sensor orientation (90°) and bracket configuration against your model's wiring diagram before ordering. Our fitment team is available to confirm compatibility — just reach out before you buy. In stock and ready to ship today.