Supco SHL513 Plenum Limit Switch L170-40F

The Supco SHL513 Plenum Thermostat is an electrical temperature control component used to manage airflow safe equipment operation. It is installed in furnace or air handler plenum sections to monitor air temperature and respond at preset thresholds, opening at 170F and closing at 130F in HVAC systems. It supports commercial heating systems by regulating fan operation or triggering safety responses during high-temperature conditions. Within the system, it operates as a control and protection component that support to maintain stable operation of ducted heating equipment.