Lennox 97J69 WC SPST Pressure Switch - 0.85

The Lennox 97J69 is a single-pole single-throw (SPST) pressure switch designed for HVAC applications. This switch is calibrated to activate at 0.85 inches water column (WC) pressure, making it ideal for monitoring draft pressure in gas furnaces and other heating equipment.

Key Features:

• Pressure activation point: 0.85 inches water column
• SPST (Single Pole Single Throw) configuration for simple on/off control
• Designed for use in Lennox furnaces and compatible HVAC systems
• Safety component that ensures proper draft pressure before system operation
• Reliable pressure sensing for gas-fired heating equipment

This pressure switch is a critical safety component that monitors the pressure differential in the furnace's venting system. When proper draft pressure is established, the switch closes to allow the heating sequence to continue. If inadequate draft is detected, the switch remains open, preventing unsafe operation.