OEM Lennox Dual Pressure Switch w/ Bracket — 24W50

The genuine OEM Lennox 24W50 dual pressure switch, complete with its factory mounting bracket, verifies proper venting and draft across both firing rates of a two-stage Lennox furnace. Each switch monitors the negative pressure produced by the inducer motor, closing its contacts only when airflow is correct at low and high stages so the burners fire safely under every operating condition.

When this assembly begins to fail, the furnace may lock out on ignition, refuse to advance to high stage, short-cycle, or trigger a pressure-switch fault code on the control board. Cracked sensing tubes, corroded contacts, or a switch stuck open or closed are the usual causes of intermittent or complete no-heat conditions.

Selecting the OEM Lennox 24W50 ensures both switches trip at the precise setpoints your two-stage furnace demands, and the included bracket positions them exactly as the factory intended for accurate pressure sensing. Because this is a safety-critical control, an off-spec aftermarket part can misread draft, cause nuisance lockouts, or permit unsafe operation. The factory-matched calibration preserves seamless integration with the Lennox ignition sequence.