OEM Carrier Flame Sensor 50HJ401431 for Model PY1RPA072074ACWA

This is the genuine OEM Carrier flame sensor, part number 50HJ401431, factory-specified for the Carrier PY1RPA072074ACWA packaged rooftop unit. The flame sensor (also called a flame rod) monitors the burner flame during every ignition cycle by passing a small microamp current through the flame to ground. When the sensor is coated with carbon deposits or has failed, the control board receives no confirmation signal and shuts off the gas valve — typically within 5 to 8 seconds of ignition — triggering a safety lockout. Replacing this sensor is one of the most common and cost-effective repairs in commercial packaged HVAC service.

• Specs: OEM part # 50HJ401431 | Stainless steel sensing rod | Alumina-coated probe for corrosion resistance | Dimensions: 2.9″ W × 4″ D × 1.75″ H | Weight: 0.09 lbs | Compatible with 24V AC control circuits
• OEM vs Generic: This factory OEM sensor is calibrated to exact microamp thresholds required by the Carrier control board on the PY1RPA072074ACWA. Generic sensors with loose tolerances can cause nuisance lockouts or fail to detect marginal flames, creating a safety hazard.
• Install difficulty: 2/5 — Shut off gas supply and disconnect power before servicing. Tools needed: 1/4″ hex driver, needle-nose pliers, and a multimeter capable of measuring microamps (µA) to verify sensor output post-install. Always confirm flame signal reads 1.5–4 µA DC after replacement.
• Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day when ordered by 3 PM local time.

Compatibility: Engineered for the Carrier PY1RPA072074ACWA packaged rooftop gas/electric unit. Verify OEM part number 50HJ401431 against your unit's service data label before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions.