What is the function of the high-limit control in deep fat fryers?

The function of the high-limit control in deep fat fryers is primarily to ensure safety by shutting off the fuel or energy supply when the fat temperature exceeds a predetermined threshold. This mechanism is crucial in preventing potential fire hazards that can arise from excessively heated oil, which can ignite and cause dangerous conditions in the cooking environment. By automatically interrupting the heat source, the high-limit control protects both the equipment and the surrounding area from the risks associated with overheating, thereby enhancing overall operational safety in commercial cooking operations.

The other options, while relevant to the cooking process, do not encapsulate the primary safety role of the high-limit control. Maintaining a consistent frying temperature and preventing oil from smoking involve different aspects of fryer operation, while controlling the frying time pertains to how long food is cooked rather than monitoring and managing temperature extremes.