The Trane SWT1258 Limit Switch is a critical safety component designed for precise thermal regulation in Trane and American Standard furnaces

Most failures are due to external shorts in the 24V contactor coil or thermostat wiring

also known as the Model DI-2 Draft Inducer

space-saving round aluminum case

Universal R-23MM Fitment: Direct replacement for Parker R23MM and compatible Jackes Evans valve stems

Danfoss 042N0185 Timer 321894-709 The Trane SWT1258 Limit SwitchThe Danfoss 042N0185 ET20M Electronic Timer is a specialized accessory designed for industrial solenoid valve control, providing high precision timing for both pulse start and on delay operations. This unit features a universal 24 240VAC voltage range, making it a versatile drop in solution for diverse electrical panels without requiring multiple SKU inventories. Its adjustable time range of 1 to 45 minutes allows for granular control over system