When you're troubleshooting a furnace that won't ignite or is short-cycling

For optimal performance and to avoid intermittent dropouts

To monitor currents below 1A

Extreme Temperature Rating: Built with 70°C ambient Class F insulation to prevent premature failure during peak summer loads

As a field technician

York S1-025-38678-000 Control 323613-751 When you're troubleshooting a furnaceThe York S1 025 38678 000 is a high limit safety component engineered for precision monitoring of discharge line pressures in residential and light commercial HVACR systems. This high refrigerant pressure control is factory calibrated with 300 150# setpoints to ensure the compressor remains protected against extreme head pressure conditions. As a genuine OEM York part, it provides dependable field reliability for technicians servicing York, Luxaire,