York s1-02538950000 Flame Sensor 34 Inch Lead

Product Description

The YORK s1-02538950000 is a flame sensor designed for use in gas furnace systems where proving burner ignition is a critical control function. The sensor features a 34-inch lead, providing sufficient wire length to reach the control board in a variety of furnace cabinet configurations. Flame sensors work by passing a small rectified current through the burner flame to signal the control board that ignition has been established. Without a functioning flame sensor, the furnace control will lock out on a no-flame fault. This part is installed by licensed HVAC technicians as part of routine maintenance or fault diagnosis on gas-fired heating equipment.

This flame sensor is suited for residential gas furnace applications where the original YORK sensor has failed, corroded, or become coated with oxidation buildup that causes nuisance lockouts. The 34-inch lead length accommodates installations where the sensor bracket is positioned at a distance from the main control board wiring harness. Technicians frequently replace flame sensors when troubleshooting ignition lockout codes or erratic burner cycling.

Key Features

• 34-inch lead length for flexible routing within furnace cabinet
• OEM YORK replacement part for accurate fit and function
• Designed to detect and prove burner flame for furnace control board signal
• Direct replacement minimizes modification during installation

Compatibility

Designed as an OEM-style replacement flame sensor for YORK residential gas furnace systems. Consult the equipment service manual or YORK parts lookup to confirm fitment for a specific model before ordering.

Installation Notes

Flame sensor replacement is performed by licensed HVAC technicians. Always shut off power to the furnace at the disconnect or breaker and turn off the gas supply before beginning any service work. The sensor rod must be positioned correctly in the burner flame path per the original equipment configuration. Do not use abrasive cleaning compounds on the new sensor rod, as surface damage can impair flame-signal performance.

Technical Specifications

• Lead Length: 34 inches
• Part Type: Flame Sensor

Standard Information

• Brand: YORK
• Manufacturer Part Number: s1-02538950000