What does a motor overload switch interrupt in case of overheating?

A motor overload switch is designed to protect electric motors from damage that can occur due to overheating. This overheating can result from excessive current draw, which can be caused by various issues such as mechanical binding, overloading, or electrical faults. When the motor experiences these conditions, the overload switch will interrupt the electrical power supply to the motor. By doing so, it prevents permanent damage to the motor by allowing it to cool down and thereby helping to ensure the longevity and proper functioning of the system.

In this situation, other options like fuel supply, water circulation, and airflow are related to different operational aspects of heating systems but are not directly affected by a motor overload switch, which specifically relates to managing electrical current and protecting the motor itself.