Lennox Furnace Pressure Switch WC SPST

This Lennox furnace pressure switch (also called a furnace air pressure switch or draft inducer pressure switch) is a replacement part for Lennox gas furnaces. It is a single-pole, single-throw (SPST) switch rated in inches of water column (WC). It monitors the draft created by the inducer motor and helps confirm proper venting before the furnace ignites.

Key Features:

• SPST switch design that opens and closes the control circuit in response to pressure changes
• Pressure setpoint measured in inches of water column (WC)
• Helps keep the furnace from firing unless the inducer draft is proven
• Designed as a replacement for Lennox furnace pressure switches

A working pressure switch is an important part of a furnace's safety system. It helps prevent operation when the vent or inducer is blocked or not working. Pressure setpoint, voltage rating and other specifications differ by part number, so check the individual item listing for its exact details.