OEM Carrier 90° Flame Sensor (48GS400192) for Model PY3PNA036090AB

This OEM flame sensor is the factory-specified replacement for the Carrier PY3PNA036090AB gas furnace. The flame sensor (also called a flame rod) monitors burner ignition by detecting a small microamp current through the flame itself. When the sensor rod oxidizes or becomes coated with residue, it can no longer read the flame accurately — causing the furnace control board to shut off the gas valve as a safety measure. The result: your furnace lights, runs for 5–8 seconds, then shuts off and locks out. Replacing this low-cost OEM sensor is one of the most common furnace repairs and restores normal heating operation immediately.

• Specs: 90° mounting angle | Includes mounting bracket | Factory-matched rod length and composition | OEM part number 48GS400192
• OEM vs Generic: This is a genuine Carrier OEM part with exact rod geometry, alloy composition, and bracket fit. Generic sensors may have incorrect rod angles or substandard alloys that oxidize faster, leading to repeat failures.
• Install difficulty: 2/5 — Turn off gas and power before starting. Tools needed: 1/4" nut driver, fine steel wool or emery cloth (to clean rod before install), multimeter (to confirm microamp reading post-install). The sensor is typically secured by a single screw and a push-on wire connector — average install time under 20 minutes.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse.

Compatibility: Designed for use with the Carrier PY3PNA036090AB gas furnace. Always verify your unit's data plate and existing part number before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — contact us today and get this part shipped to your door.