What device is used to prove that a Dryer Motor is running?

The device used to prove that a dryer motor is running is a centrifugal switch. This switch is integral to the operation of many electric motors, particularly in appliances like dryers. It functions by detecting the speed of the motor; once the motor reaches a certain RPM (revolutions per minute), the centrifugal force activates the switch. This activation allows electricity to flow to additional components of the dryer, such as heating elements, thereby indicating that the motor is running correctly.

In the context of a dryer, it serves a critical role in ensuring safe and effective operation. If the motor is not running, the centrifugal switch will not engage, preventing additional components from operating and thus protecting the appliance from potential failure or hazards.

Understanding the function of the centrifugal switch is crucial for diagnosing issues within a dryer. Other devices like limit switches, thermostats, and relays serve different roles in appliance systems, such as controlling temperature or power supply, but they do not specifically indicate motor operation in the same manner.