OEM Carrier 90° Flame Sensor (48GS400192) for Model PY2PNB024060NB

This OEM Carrier flame sensor is the factory-specified replacement for the Carrier PY2PNB024060NB gas furnace. The flame sensor — also called a flame rod — uses ionization/rectification technology to detect the presence of a burner flame during each heating cycle. When the control board calls for heat and the igniter lights the burners, the sensor passes a micro-amp DC signal through the flame back to ground. If that signal falls below threshold — whether from carbon buildup, a cracked rod, or a failed sensor — the board shuts off the gas valve within 5–8 seconds as a safety measure, causing the notorious "lights then immediately shuts off" symptom. Replacing this OEM part restores proper flame detection and eliminates nuisance lockouts.

• Specs: 90° mounting angle | Includes mounting bracket | Rod length ~1.6 in. | Overall dimensions approx. 4.9 × 1.75 in. | OEM Part # 48GS400192
• OEM vs Generic: This is a genuine Carrier OEM sensor built to factory micro-amp tolerances. Aftermarket sensors can drift out of spec quickly, causing repeat lockouts and unnecessary service calls.
• Install Difficulty: 2/5 — Turn off power and gas before servicing. Tools needed: 1/4" nut driver, flathead screwdriver, fine steel wool or emery cloth (to lightly clean rod if reusing), multimeter (to verify micro-amp reading post-install). Disconnect the single wire connector, remove the mounting screw, swap sensor, and reconnect.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY2PNB024060NB gas furnace. Always verify the OEM part number on your existing sensor or in your unit's wiring diagram before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by — order with confidence and get same-day shipping on in-stock parts.