OEM Carrier Flame Sensor 50HJ401431 for Model PY1REA120180ABWA

This is the genuine OEM flame sensor (part #50HJ401431) factory-specified for the Carrier PY1REA120180ABWA packaged gas unit. The flame sensor — also called a flame rod — is a critical safety component mounted in the burner assembly. After ignition, the control board sends a small microamp current through the sensor rod; if a live flame is detected, the current completes the circuit and the burner stays on. When the sensor fails or becomes coated with oxidation, the control board cannot confirm ignition and shuts off the gas valve within 5–8 seconds as a safety measure — causing the frustrating symptom of the unit lighting briefly, then immediately going out. Repeated lockouts follow until the sensor is replaced.

• Specs: OEM Part # 50HJ401431 | Stainless steel sensing rod | Alumina-coated probe for corrosion resistance | Compact form factor (approx. 2.9" W × 4" D × 1.75" H) | Compatible with standard 24V AC furnace control circuits
• OEM vs Generic: This is the exact factory-original Carrier part — not an aftermarket substitute. OEM sensors are calibrated to the precise microamp threshold required by the Carrier control board. Generic sensors may fall outside tolerance, triggering false lockouts or nuisance trips even after cleaning.
• Install Difficulty: 2/5 — Turn off gas supply and 120V power to the unit before beginning. Tools needed: 1/4" hex driver or nut driver, needle-nose pliers, and a multimeter (to verify microamp signal if desired). Photograph the existing wire routing before disconnecting. The sensor mounts with one screw in the burner box and connects via a single push-on wire terminal. Total replacement time is typically under 20 minutes.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse when placed before cutoff.

Compatibility: Designed as the direct OEM replacement flame sensor for the Carrier PY1REA120180ABWA packaged gas/electric unit. Always cross-reference part number 50HJ401431 against the data plate inside your unit's control access panel before ordering. Have a fitment question? Our HVAC parts team verifies compatibility before you buy — reach out before placing your order.