Supco SHF120 Temperature Control Fan Switch 120°F Cut-In 110°F Cut-Out

The Supco SHF120 Temperature Control Fan Switch is a temperature-sensitive switching component that controls fan circuit operation according to sensed temperature in HVAC systems. It uses a sensing mechanism that changes the switch state at its specified temperature thresholds, with a 120F cut-in and 110F cut-out setting. The switch is positioned at the designated temperature-sensing point and wired into the applicable fan control circuit. Its switching action establishes fan operation when the temperature reaches the cut-in point and interrupts the circuit when conditions fall to the cut-out point.