Lennox 88K90 WC SPST Pressure Switch - 0.47

The Lennox 88K90 is a single-pole single-throw (SPST) pressure switch designed for use in Lennox heating and air conditioning systems. This switch monitors air pressure within the system and is calibrated to activate at 0.47 inches water column (WC), ensuring proper airflow and safe operation of the furnace or HVAC unit.

Key Features:

• Pressure activation point: 0.47" WC
• SPST (Single-Pole Single-Throw) configuration for simple on/off switching
• Designed as a genuine Lennox OEM replacement part
• Monitors induced draft blower or ventilation system pressure
• Critical safety component that prevents furnace operation under unsafe conditions

This pressure switch is a direct replacement for Lennox furnaces and HVAC systems. It ensures that adequate combustion air pressure is present before allowing the heating system to operate, preventing potential safety hazards such as incomplete combustion or carbon monoxide production.