Lennox 56W20 Limit Switch, 120-150°F

This Lennox 56W20 is a limit switch used to monitor temperature in the furnace plenum or heat exchanger, shutting down the burner or blower circuit if temperatures rise outside a safe range. It is rated 120-150°F and resets automatically once the unit cools back within range. This is a genuine Lennox replacement part. Confirm the part number 56W20 against your equipment's parts list before ordering.