The Heatcraft Refrigeration 28913401 Low Pressure Switch with Conduit is an OEM replacement safety component designed for commercial refrigeration systems, including Heatcraft unit coolers and compatible walk-in cooler and freezer equipment. It monitors refrigerant suction pressure and automatically opens or closes the electrical circuit when pressure reaches its designated threshold,... https://www.partshnc.com/28913401-heatcraft-refrigeration-low-pressure-switch-wconduit