Lennox SureLight 63K8901 Furnace Board | White-Rodgers - F59LU

Lennox SureLight 63K8901 Furnace Control Board | White-Rodgers 50A62-120 | Tested Condition: Used – Tested & Fully Functional Availability: Ready for Pickup / Fast Response Key Specifications Brand: Lennox SureLight™ Manufactured By: White-Rodgers (WR) OEM Applications: Lennox Gas Furnaces Part Numbers: 63K8901 50A62-120 Secondary Number: 9818-E4C Control Type: Integrated Furnace Control (IFC) Ignition Standard: ANSI Z21.20 Automatic Ignition System Electrical Rating: 24VAC 60Hz 0.5A Maximum Thermostat Terminal Connections 5-Screw Low Voltage Terminal Strip Terminal Function Y Cooling G Indoor Fan W Heating R 24V Power C 24V Common 120V Line Voltage Connections Main Power 120 VAC HOT 120 VAC TX 120 VAC RETURN (Neutral Bank) Blower Outputs ACB HEAT ACB COOL ACB LOW Parking Terminals PARK M1 PARK M2 Accessory Outputs ACC HTG ACC Additional Connections Flame Sensor FLAME SENSE Low Voltage Power 24 VAC HOT 24 VAC RTN Harness Connectors 6-Pin (2×3) Molex Connector 9-Pin (3×3) Molex Connector Major Components Microcontroller Motorola SC527601CP Additional Markings: 150-0456 6D56G CTCTAB9815 Controls: Ignition sequence Flame monitoring Blower timing Safety shutdown Diagnostic operation Crystal Oscillator SG531P 2.000 MHz Provides processor timing reference. Main Power Relay ZETTLER AZ2150-1A-24DF(217) Coil: 24VDC Contacts: 30A @ 240VAC 30A @ 125VAC NAIS Relays JS1-B-24V (AJS131281) Coil: 24VDC JS1-B-18V (AJS131681) Coil: 18VDC Used for blower, ignition, and accessory control functions. Compatibility Direct replacement for: Lennox 63K8901 White-Rodgers 50A62-120 Commonly installed in: Lennox SureLight™ gas furnaces Compatible with systems featuring: Single-stage gas heating Multi-speed PSC blower motors SureLight ignition control Standard 24VAC thermostats ⚠️ Always verify before purchasing: Furnace model number Existing control board part number Connector configuration Board revision Blower wiring Why Buy This Board? ✔️ Genuine OEM Lennox SureLight control board ✔️ Manufactured by White-Rodgers ✔️ Fully tested and ready for installation ✔️ Supports standard Lennox furnace controls ✔️ Reliable OEM replacement for failed boards ✔️ Cost-effective alternative to buying new Pickup: Toronto / GTA