Verify that the venting is clear of debris

significantly reducing the risk of flooded starts and internal mechanical damage

which must be purchased separately

but you must ensure both furnaces use identical boards and that your dip switch settings are configured correctly to synchronize 115V blower operation

This part number refers specifically to the bearing bracket housing

York S1-024-35778-000 Pressure Switch 319852-301 Verify that the venting isThe York S1 024 35778 000 Pressure Switch is a critical safety component designed for precise monitoring of inducer blower performance in high efficiency furnace systems. Calibrated at a . 6" WC set point, this OEM HVAC air pressure switch ensures that the draft inducer is exhausting combustion gases correctly before the ignition sequence initiates. For service technicians, identifying a failing switch often involves troubleshooting lockout codes