The Robertshaw 780-735 ignition module is a universal hot surface ignition (HSI) control designed for reliable gas furnace repair and system troubleshooting

Real-Time Diagnostics: SensorCheck microprocessor monitors circuitry and provides fault indication via 4-20 mA loop shift

The most common symptom is short cycling

Automatic Diagnostics: The auto-reset function simplifies troubleshooting for recurring thermal limit trips versus manual lockouts

Built with industrial-grade internals

York S1-025-36388-003 Pressure Switch 326058-758 The Robertshaw 780-735 ignition moduleThe York S1 025 36388 003 is a critical safety component designed for precise monitoring of combustion blower performance in residential HVAC systems. This PS80 04 F0312 model functions as an inductive load pressure switch, ensuring the draft inducer motor establishes proper static pressure before the ignition sequence begins. Engineered specifically for furnace pressure switch replacement applications, this OEM component prevents hazardous operation