Trane SWT1271 Limit Switch such as the 12A09 or

such as the 12A09 or 12A39

offering technicians a reliable point of isolation that resists vibration and thermal cycling

By using an authentic York replacement part

or 142 lb-in models

usually removing the requirement for downstream venting

Trane SWT1271 Limit Switch such as the 12A09 orThe Trane SWT1271 is a critical furnace high limit switch designed for HVAC system diagnostics and thermal protection. As a standard OEM replacement part, this auto reset limit switch prevents the heat exchanger from reaching a hazardous open temperature of 180F, cutting off power to the gas valve until the unit cools to its 150F reset point. For technicians troubleshooting furnace short cycling or 4 flash error codes on a Trane or American Standard