120-630

The York Fan Limit L170-60F is a high-performance safety and operational control designed for forced-air heating systems. This fan limit switch plays a critical role in furnace maintenance by monitoring the temperature within the heat exchanger. It functions as a dual-purpose sensor: it regulates the blower motor's cycle to ensure efficient heat distribution and serves as a high-limit safety cut-out. If the internal furnace temperature reaches the 170°F threshold, the switch automatically interrupts the heating circuit to prevent overheating and potential equipment damage. Once the system cools by the designated 60°F differential, it allows for safe operation to resume. This part is essential for HVAC repair when a furnace fan fails to start, runs continuously, or if the unit is short-cycling due to a faulty limit sensor.
Type: Fan Limit Switch
Size: Standard furnace control component
Application: Commonly used in residential and commercial furnaces, air handlers, and heating units to control blower fan timing and provide high-temperature safety protection.
Specifications: High-limit trip temperature: 170°F; Fan differential: 60°F; SPST or SPDT configuration depending on wiring; Automatic reset functionality.