Trane SWT1271 Limit Switch you can set the dial

you can set the dial to 240°F to match the original equipment manufacturer's safety setpoint

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

such as the 12A09 or 12A39

or the burner shutting off shortly after ignition

Proper installation of this genuine York replacement part is essential for maintaining airflow integrity and preventing premature ignition failure or heat exchanger damage

Trane SWT1271 Limit Switch you can set the dialThe 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