OEM Carrier Flame Sensor 50HJ401431 for Model PY1RPA120180ABWA

This is the genuine OEM Carrier flame sensor (part #50HJ401431), the factory-specified replacement for the Carrier PY1RPA120180ABWA packaged gas heating unit. The flame sensor is a safety-critical component: its stainless steel rod sits in the burner flame and passes a small microamp current through it to prove combustion to the control board. When the sensor fails — typically due to oxidation or carbon buildup on the rod — the board cannot confirm a flame is present and will shut off the gas valve within 5 to 8 seconds of ignition as a safety lockout. The unit then attempts 2–3 retries before going into hard lockout, leaving you with no heat.

• Specs: Stainless steel sensing rod | Alumina-coated probe for corrosion resistance | Dimensions approx. 2.9" W × 4" D × 1.75" H | Weighs 0.09 lbs | Compatible with standard 24V AC furnace control circuits
• OEM vs Generic: This genuine Carrier OEM part is factory-calibrated for exact microamp sensitivity on the PY1RPA120180ABWA. Generic sensors may produce borderline microamp readings that cause nuisance lockouts or, worse, fail to detect true flame-out conditions — a safety risk not worth taking on a gas appliance.
• Install difficulty: 2/5 — Turn off gas and power before servicing. Tools needed: 1/4" or 5/16" nut driver, needle-nose pliers, fine steel wool or emery cloth (to clean rod if reusing). Disconnect the single wire lead, remove the mounting screw, swap the sensor, and torque snugly. Always verify microamp reading with a multimeter after install (healthy range: 2–6 µA DC).
• Warranty: 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PY1RPA120180ABWA packaged gas/electric unit. Verify part number on your existing sensor or equipment data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no return hassle.