Description
The York S1-02439714000 Pressure Switch TM9E100 & 120 is an air pressure sensing component used to monitor air flow or draft conditions within compatible furnace system. It operates by responding to negative pressure levels, changing electrical state when the specified 0.90 water column condition is reached. The switch is typically mounted in the burner or inducer section where it evaluates combustion air movement and venting performance in HVAC systems. It works in coordination with the inducer motor, control board, and safety circuit to confirm proper airflow before ignition.
