Lennox 73K17 Limit Switch 318172-701 This DSI controller ensures 120VAC

This DSI controller ensures 120VAC gas ignition safety with integrated LED diagnostics for rapid field troubleshooting and minimizes downtime for contractors managing high-output burner systems

reducing downtime during critical maintenance windows

The FF4H is a Single Pole Single Throw (SPST) device

ensuring a seamless interface with existing drain line connections

Lennox 73K17 Limit Switch 318172-701 This DSI controller ensures 120VACAs an HVAC technician, you know that a failed limit switch is a primary cause for furnace short cycling and overheating. The Lennox 73K17 is a genuine OEM limit switch designed specifically for Lennox, Allied, Armstrong, and Ducane heating units. This SPST normally closed high limit control features a 7 inch insertion length, making it compatible with various air handlers and furnaces, such as the G23Q5 6 series. It operates as an auto reset limit