Lennox 20J99 Limit Switch 323269-701 preventing liquid slugging and protecting

preventing liquid slugging and protecting the compressor during variable load conditions

this unit allows for non-intrusive installation without disconnecting existing power conductors

limit string lockout

This robust HVACR air vent features a 3/4 inch NPT inlet and a 1/4 inch NPT outlet

As a direct replacement for part numbers often ending in BX

Lennox 20J99 Limit Switch 323269-701 preventing liquid slugging and protectingThe Lennox 20J99 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces and air handlers. Engineered as a normally closed thermal protector, this switch features an automatic reset mechanism calibrated for a 130 160F temperature range. When the heat exchanger area exceeds the 160F threshold, the internal bimetal disc triggers the circuit to open, immediately interrupting the gas valve or