Replacement high temperature limiter kit (aka. hi-temp switch or over-heating switch).
A high limit switch in an electric smoker is a safety feature that prevents the smoker from overheating. It is designed to shut off the heating element when the temperature inside the smoker reaches a certain threshold. This helps to prevent damage to the smoker and reduces the risk of a fire hazard. Without a high limit switch, the electric smoker could potentially overheat and cause a dangerous situation.