Pressure-Sensitive Interrupter: Integrated internal safety mechanism designed to disconnect the capacitor in the event of an internal fault or end-of-life pressure buildup

ensuring consistent operational safety

which is the standard capacity for most residential and light commercial HVAC control circuits

or restricted ductwork before replacing the switch

This black plastic cooling fan blade is a genuine OEM replacement part designed to dissipate heat from the inducer motor shaft

Lennox 34M77 Pressure Switch Els PW 17895 Pressure-Sensitive Interrupter: Integrated internal safetyEnsure reliable sequence of operation with the Lennox 34M77 Pressure Switch, a critical safety component designed for heating and cooling systems. This OEM Lennox furnace pressure switch is engineered to monitor draft pressure and confirm proper inducer motor performance before allowing the ignition process to begin. Featuring a precise 1. 00"wc SPST (Single Pole Single Throw) configuration, this switch actuates at 1. 00" W. C. and resets at 1. 15" W.