Lennox 18Y05 Control Module 321894-709 Exact OEM Compatibility: Eliminates the

Exact OEM Compatibility: Eliminates the gaps and bypass issues often found with generic "cut-to-fit" foam or mesh alternatives

Compatibility depends on the specific gas valve model and furnace series

This is a complete vent blower assembly

providing reliable SPST switching to activate whole-home humidifiers or energy recovery ventilators (ERVs)

Lennox 18Y05 Control Module 321894-709 Exact OEM Compatibility: Eliminates theThe Lennox 18Y05 Control Module is a critical OEM replacement component designed for high performance management of residential HVAC systems. As a veteran grade HVAC control board, this module provides precise Regulation for 1 or 2 stage air conditioning units and is frequently utilized in Lennox gas furnace configurations. It serves as the central hub for monitoring system inputs and outputs, ensuring seamless communication between the thermostat and