OEM Carrier Flame Sensor 50HJ401431 for Model PY1REA090180ACWA

This genuine OEM flame sensor (part #50HJ401431) is the factory-specified replacement for the Carrier PY1REA090180ACWA packaged gas heating unit. The flame sensor — also called a flame rod — uses a small electrical current passed through a stainless steel probe to detect the presence of a burner flame. When the control board cannot confirm flame establishment, it shuts off the gas valve as a critical safety measure. A failing flame sensor is one of the most common causes of a furnace that lights briefly then shuts off within 5–8 seconds, triggering a lockout fault code. Carbon buildup on the probe tip is the leading cause of failure and can sometimes be cleaned, but a degraded or cracked sensor must be replaced with the correct OEM part.

• Specs: OEM Part #50HJ401431 | Stainless steel sensing probe with alumina-coated insulator | Compact form factor (approx. 2.9" W × 4" D × 1.75" H) | 24V AC control circuit compatible | Weighs approx. 0.09 lbs
• OEM vs Generic: This is a genuine Carrier OEM part, manufactured to exact factory tolerances for flame current output and probe geometry. Aftermarket sensors may have mismatched probe angles or inferior coatings, leading to nuisance lockouts or premature failure.
• Install Difficulty: 2/5 — Power down the unit and allow the heat exchanger to cool completely before servicing. The sensor mounts with a single screw and connects via a push-on wire terminal. Tools needed: 1/4" hex driver or nut driver, fine steel wool or emery cloth (to clean bracket area), multimeter (to verify microamp flame current). Always verify the probe tip is correctly positioned in the burner flame path.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Engineered for the Carrier PY1REA090180ACWA packaged rooftop gas/electric unit. Verify your unit's OEM part number on the data plate or wiring diagram before ordering. If you have any questions about fit, our HVAC parts specialists confirm compatibility before you buy — contact us today and get your system back online fast.