Lennox Y9894 Control Board 30067439-890 one inlet is directed to

one inlet is directed to one of two outlets to bypass or satisfy a terminal load

This SPST (Single Pole Single Throw) switch is calibrated to a 5

which is essential for maintaining the SEER ratings of the original equipment

Liquid Line Diagnostics: The large

The progressive switching differential

Lennox Y9894 Control Board 30067439-890 one inlet is directed toThe Lennox Y9894 Control Board is a high performance integrated furnace control designed for precise ignition sequencing and fan motor regulation in Lennox G50 and G1 series gas furnaces. As a direct replacement ignition board, it consolidates multiple older revisions into a single, robust hardware platform. This 24V AC module manages the hot surface igniter (80V AC output), inducer motor, and blower operations with advanced logic to ensure efficient