120-656

The York L170 Manual Reset High Limit Switch is an essential safety component designed for residential and commercial forced-air furnaces and HVAC systems. This high-limit control acts as a critical safeguard by monitoring the temperature within the heat exchanger. If the system exceeds a safe operating temperature of 170°F—often caused by restricted airflow, a dirty filter, or a failing blower motor—the switch automatically breaks the electrical circuit to shut down the heating elements or burners. As a manual reset thermal disc, it ensures that the system cannot restart until a technician or user has inspected the unit and physically reset the switch, preventing repetitive overheating and potential equipment damage. Durable and reliable, this fan disc style switch is a standard replacement part for maintaining the safety and efficiency of your heating equipment.
Type: Fan Disc High Limit Control Switch
Size: Standard HVAC residential/commercial size
Dimensions: unknown × unknown × unknown
Application: Forced-air furnaces, gas-fired heating units, and HVAC air handlers requiring a high-temperature safety cutout.
Specifications: Cut-out temperature: 170°F; Reset type: Manual; Contact action: Normally closed (opens on temperature rise); Mounting: Flange mount for surface sensing.