this assembly is the factory-designated replacement for several legacy part numbers

If voltage is present but the load terminals fail to show continuity within the specified timing window—usually 1 to 110 seconds—the internal heater or bimetal disc has failed

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

significantly reducing the risk of flooded starts and internal mechanical damage

Verify that the venting is clear of debris

York S1-024-35778-000 Pressure Switch 319852-301 this assembly is the factory-designatedThe 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