Lennox 21L14 Controller 322838-752 4-speed operation

4-speed operation

Will this switch work with R-410A systems

Key Benefits Optimized Static Pressure: Rated for 1000 CFM

or a total failure of the 24V signal to pass through the Normally Open (NO) or Normally Closed (NC) poles

single-throw (SPST) control designed for heavy-duty HVAC/R applications

Lennox 21L14 Controller 322838-752 4-speed operationThe Lennox 21L14 Controller (catalog number 106855 01) is a critical M4 W4 CORE Unit Controller Replacement kit designed for high performance management of Lennox commercial rooftop units and split systems. As a genuine OEM Lennox HVAC control board, it functions as the primary logic module, processing multi sensor inputs to execute precise HVAC system sequencing, ignition timing, and blower motor coordination. This integrated furnace control is