OEM Carrier Flame Sensor (48GS400192) for Model PY1PJB048090AAAA

This is the factory OEM replacement flame sensor (part #48GS400192) for the Carrier PY1PJB048090AAAA gas furnace. The flame sensor is a safety-critical component: it uses electrical rectification/ionization to detect whether the burner has successfully ignited. When the control board calls for heat, it monitors a small microamp current through the flame rod. If the sensor is coated with oxidation or has failed outright, the board cannot confirm flame presence and will shut off the gas valve — typically 5 to 8 seconds after ignition — triggering a lockout fault. Replacing the flame sensor is one of the most common and cost-effective furnace repairs.

• Specs: 90-degree flame rod with mounting bracket | OEM part #48GS400192 | Factory-matched geometry and rod material for accurate microamp signal | Compatible with standard 1/4" female quick-connect terminal
• OEM vs Generic: This is a genuine Carrier OEM part, ensuring exact rod length, bend angle, and bracket dimensions. Aftermarket sensors may vary in rod geometry, leading to unreliable flame signal readings and nuisance lockouts.
• Install difficulty: 2/5 — Power off and allow burner to cool before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, fine steel wool or emery cloth (to clean rod if reusing). Disconnect the single wire lead, remove the mounting screw, swap the sensor, and reconnect. Always verify microamp reading with a multimeter after installation.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PY1PJB048090AAAA gas furnace. Verify your unit's data plate and existing part number before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today. In stock and ships same business day.