including Armstrong and Ducane

The sweat union connection allows for a leak-free mechanical joint

ensuring consistent seat integrity and system efficiency in demanding environments

reducing the heat-soak risk to the valve body

It is calibrated to open the electrical circuit when temperatures reach the 110°F to 130°F threshold

Lennox 80K27 Pressure Switch Els PW 17895 including Armstrong and DucaneThe Lennox 80K27 Pressure Switch is a critical safety and operational component designed for high performance Lennox HVAC systems. Engineered for precision, this furnace pressure switch features a 0. 34" wc setpoint, ensuring the draft inducer motor is moving exhaust gases safely before the ignition sequence begins. The SPST (Single Pole Single Throw) configuration provides a reliable normally open circuit that closes under proper pneumatic pressure,