Observed Component IdentificationHeavy-Duty AC Contactor: The large black block attached to the upper DIN rail functions as a magnetic power relay. It switches the heavy three-phase or high-current single-phase lines to the main heating elements when signaled by the thermostat.Safety High-Limit Thermostat: The block with the manual reset pin. This mechanical switch acts as an emergency cutoff that breaks the control circuit if the frying oil exceeds unsafe temperatures (typically above 220°C/430°F) to prevent a grease fire.Main Operating Thermostat: The dial and block switch mechanism used to adjust and maintain the daily cooking