OEM Carrier Flame Sensor (48GS400192) for Model PY3PNA024040NB

This OEM flame sensor is the factory-specified replacement for the Carrier PY3PNA024040NB gas furnace. The flame sensor — also called a flame rod — is a critical safety component mounted in the burner assembly. Using ionization/rectification technology, it detects the presence of a burner flame and sends a microamp signal to the control board to confirm ignition. When the sensor fails or becomes coated with oxidation, the control board cannot verify the flame is lit and will cut gas flow within 5–8 seconds as a safety lockout. The result: your furnace lights briefly, then shuts off repeatedly — often triggering a fault code.

• Specs: 90-degree angle mounting bracket | Compact rod design (~4.9" L × 1.75" H) | OEM part number 48GS400192 | Factory-matched microamp signal output
• OEM vs Generic: This is a genuine OEM Carrier part, ensuring exact fit and calibrated signal sensitivity. Aftermarket sensors can vary in rod alloy and bracket angle, leading to nuisance lockouts or premature failure.
• Install difficulty: 2/5 — Turn off gas and power before starting. Tools needed: 1/4" or 5/16" nut driver, needle-nose pliers, fine steel wool or emery cloth (to clean rod contact if needed). Disconnect the single wire lead, remove the mounting screw, swap the sensor, and reconnect. Job typically takes under 15 minutes.
• Warranty: 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PNA024040NB gas furnace. Always verify your unit's existing OEM part number on the component label or data plate before ordering. Our fitment team is available to confirm compatibility before you buy. Order now — in stock and ships today.