OEM Carrier Flame Sensor 50HJ401431 for Model PY1REA048115AAWB

This OEM flame sensor (part #50HJ401431) is the factory-specified replacement for the Carrier PY1REA048115AAWB packaged gas heating unit. The flame sensor — also called a flame rod — detects the presence of a burner flame by passing a small microamp current through the flame to ground. When the sensor is dirty, corroded, or failed, the control board cannot confirm ignition and will shut off the gas valve as a safety measure, typically within 5 to 8 seconds of burner light-up. The result: repeated short-cycle lockouts and a system that refuses to heat.

• Specs: OEM part #50HJ401431 | Stainless steel sensing rod | Alumina-coated probe | Dimensions approx. 2.9" W × 4" D × 1.75" H | Weighs 0.09 lbs | Compatible with standard 24V AC control circuits
• OEM vs Generic: This is a genuine OEM Carrier part manufactured to exact factory tolerances. Generic sensors may vary in rod length, mounting angle, or coating quality — all of which affect microamp output and trigger false lockouts even when new.
• Install Difficulty: 2/5 — Turn off gas and power before starting. Tools needed: 1/4" hex or nut driver, needle-nose pliers, and optionally a multimeter to verify microamp reading (should read 2–6 µA). Disconnect the single wire connector, remove the mounting screw, swap the sensor, and reconnect. Always verify flame signal with the board on first test fire.
• Warranty: 1-year OEM factory warranty against defects. In-stock orders ship same business day from our warehouse when placed by 3 PM local time.

Compatibility: Designed as a direct OEM replacement for Carrier model PY1REA048115AAWB packaged gas/electric units. Verify your existing part number on the sensor or equipment wiring diagram before ordering. Our technical team is available to confirm fitment prior to purchase — just reach out before you order.