Lennox 71W43 Limit Switch 323055-751 450 VAC capacitor to ensure

450 VAC capacitor to ensure proper startup and efficiency

All unused outlets must be securely plugged using the socket plugs provided in the kit to prevent gas leaks and ensure system pressure integrity

stable signal back to the tankless water heater control board

utilizing Alkylbenzene (160ABM) oil with a factory charge of 1

Lennox 71W43 Limit Switch 323055-751 450 VAC capacitor to ensureThe Lennox 71W43 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial furnace assemblies. This OEM Lennox replacement part, also identified as the L140 30F limit control, is engineered to monitor heat exchanger temperatures and interrupt the electrical circuit if internal heat exceeds safe parameters. With a fixed 140F opening temperature and a 110F automatic reset, this switch ensures