OEM Carrier Flame Sensor (48GS400192) for Model PY2PNB036090AA

This is the factory OEM replacement flame sensor for the Carrier PY2PNB036090AA gas furnace. The flame sensor — also called a flame rod — is a critical safety component that uses ionization/rectification technology to verify a live burner flame during each heating cycle. When it detects the flame's electrical signal, it tells the control board to keep the gas valve open. A failed or carbon-coated sensor can no longer pass sufficient microamp current, causing the furnace to light briefly and then shut down within 5–8 seconds, triggering a lockout fault code. Replacing this part restores normal heating operation immediately.

• OEM Part Number: 48GS400192 | 90-degree mounting angle | Includes mounting bracket | Factory-matched for Carrier PY2PNB036090AA
• OEM vs Generic: This is a genuine Carrier OEM part manufactured to exact factory tolerances. Aftermarket flame sensors often use lower-grade rod alloys that coat with carbon faster, reducing service life and causing repeat nuisance shutdowns.
• Install Difficulty: 2/5 — Turn off gas and power before servicing. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers, and optionally a multimeter to confirm microamp draw after installation. The sensor mounts with a single screw near the burner assembly — a straightforward swap for most DIYers.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PY2PNB036090AA gas furnace. Always verify the OEM part number on your existing sensor or equipment data plate before ordering. If you have any fitment questions, our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork required.