Description
The Armstrong Furnace R100323-02 Low Pressure Switch is used to monitor airflow or draft pressure within a furnace combustion system and react when pressure drops below the required set point. It uses a diaphragm-based SPST switching mechanism that opens or closes an electrical circuit based on measured pressure conditions to confirm proper inducer and vent operation in HVAC systems. It is mounted on the pressure-sensing tubing and ensures correct startup sequencing, reliable flame ignition conditions, and stable venting performance by confirming that sufficient draft is present for safe flame ignition operation.
