York 1171-400 Ignition Control Board

York 1106553 / 1171-400 Ignition Control Board is a panel-mounted electronic control unit for gas furnaces that manages the ignition sequence, flame sensing, and overall burner control, delivering precise ignition timing, reliable safety monitoring, and coordinated operation of related furnace subsystems within York heating systems. Designed for residential and light commercial HVAC, this ignition control board coordinates ignitor activation, gas valve operation, flame sensing, and safety lockout functions to ensure safe, efficient furnace performance; it serves as a direct replacement option for aging or failed boards in York furnaces and supports routine maintenance, diagnostics, and system integration. Compatibility is York furnace systems (model-specific), and the board is available as OEM or aftermarket replacement; common replacements include York S1-03109161000, White-Rodgers 50A55 Series, and Honeywell S8610U3009, reflecting its role as a versatile part in maintenance teams, OEMs, and system integrators. Panel-mounted design facilitates straightforward installation in compatible York furnace enclosures and supports serviceability during routine maintenance or quick swaps.