321542-401

High Precision Regulation: Maintains a constant temperature setpoint within the 77-149°F range to prevent equipment overheating and scale formation

long-term trend analysis

it remains open when energized and springs closed when power is removed

This is the power supply assembly only

York S1-025-41336-000 Limit Switch Els PW 29614 321542-401The York S1 025 41336 000 Limit Switch is a critical OEM replacement part engineered for high precision thermal monitoring in residential and light commercial furnaces. This auto reset limit switch features a factory calibrated set point of 145F on the open circuit and 105F for the closing threshold (145Op 105Cl). Designed for high reliability applications, this Source 1 furnace safety control prevents heat exchanger damage by interrupting the gas