OEM Carrier Flame Sensor (48GS400192) for Model PY1PJB048090ABAA

This is the genuine OEM Carrier flame sensor for the PY1PJB048090ABAA gas furnace. The flame sensor — also called a flame rod — is a critical safety component in your furnace's ignition sequence. Once the burner ignites, the rod is bathed in the burner flame and uses a small rectified microamp signal to confirm to the control board that combustion is actively occurring. If the board doesn't receive that signal within a few seconds, it shuts off the gas valve as a safety precaution. A contaminated or failed sensor is one of the most common reasons a furnace lights briefly then shuts off, often locking out after 3 ignition attempts.

• Part Number: 48GS400192 | OEM Carrier replacement | 90-degree rod orientation with integrated mounting bracket
• OEM vs Generic: This is the factory-specified OEM part, engineered to the exact rod geometry, alloy composition, and bracket dimensions for reliable microamp signal detection. Aftermarket sensors may have inconsistent rod coatings that cause nuisance shutdowns.
• Install Difficulty: 2/5 — Disconnect power and gas before servicing. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter capable of reading microamps (for verification). Locate the sensor on the burner assembly, unplug the single wire connector, remove the mounting screw, and reverse steps to install. Clean the rod with steel wool if reusing is ever considered — but replacement is always the recommended fix.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for the Carrier PY1PJB048090ABAA gas furnace. Verify your existing sensor's 90° rod orientation and mounting bracket style against your unit's data plate before ordering. Our team is available to confirm fitment — just reach out before you buy. Order now and ship today.