121-245

This premium High Limit Switch is a vital safety component designed for HVAC systems, furnaces, and heating equipment. Functioning as an auto-reset fan disc, this control switch monitors internal air temperatures and automatically interrupts the electrical circuit if the temperature exceeds 150°F. This thermal protection prevents overheating, ensuring the longevity of your heating unit and the safety of your home. Once the system cools back down to safe operating levels, the switch automatically resets to restore functionality. It is a common replacement part for malfunctioning furnace sensors or thermal cutouts that have failed due to age or electrical wear.
Type: Fan Disc High Limit Control Switch
Size: Standard Fan Disc
Application: Used in forced-air furnaces, air handlers, and residential heating systems to monitor plenum temperature and provide high-heat safety protection.
Specifications: Trip Temperature: 150°F (65.5°C); Reset Type: Automatic; Switch Configuration: Normally Closed; Disc Type: Snap-action temperature sensor.