Specifically engineered for the Lochinvar KBN400 series with serial numbers prior to H10

these dampers are rated to operate efficiently in systems with static pressures typically found in residential and light commercial forced-air applications

Technicians should perform a continuity test with a multimeter to confirm a break in the internal circuit

damaged thermostat wiring

York 331-02430-601 Microboard 319825-402 Specifically engineered for the LochinvarThe York 331 02430 601 Microboard is a central processing component engineered for the precise management of industrial chiller systems and large scale HVACR equipment. This OEM York control board serves as the logic hub for monitoring system variables and executing complex compressor sequences. As a direct replacement York microboard, it ensures high speed data communication between the user interface terminals and the units mechanical sensors. For