Lochinvar & A.O. Smith 100112636 Control Board 320074-702 allowing the furnace to resume

allowing the furnace to resume normal heating cycles without technician field-reset

it provides drop-in compatibility for models S1-02434558000 and S1-32432057000

Professional installation by a licensed contractor is required to ensure proper alignment of the magnetic operator and adherence to local fuel gas codes

preventing underfeeding

Ensure precise refrigerant metering and system stability with the Heil Quaker ICP 1174452 TXV

Lochinvar & A.O. Smith 100112636 Control Board 320074-702 allowing the furnace to resumeThe Lochinvar & A. O. Smith 100112636 Control Board is a critical OEM replacement part designed for precision direct spark ignition (DSI) and intermittent pilot systems in commercial water heaters and boilers. This Fenwal ignition control operates on 24VAC 120VAC, 50 60Hz, utilizing advanced flame rectification technology to monitor burner performance and ensure safe startup cycles. As a veteran grade HVAC replacement board, the 100112636 features