Trane SWT1635 Limit Switch for HST (High Starting Torque)

for HST (High Starting Torque) configurations

using the designated OEM part number 1008418 ensures the physical mounting and pressure ratings match your specific furnace model

the flame sensor is likely failing to send a sufficient microamp signal to the control board due to soot or oxidation

As a direct 8402-048 replacement

Trane SWT1635 Limit Switch for HST (High Starting Torque)The Trane SWT1635 Limit Switch is a critical OEM replacement component designed for high limit thermal protection in residential and light commercial HVAC units. Engineered with a 3 inch insertion depth, this furnace limit switch monitors internal plenum temperatures to prevent heat exchanger damage. This L180 30 limit switch is factory calibrated to trip and open the circuit at 180F, featuring an automatic reset that restores operation once the