This is the moisture sensor for your dryer. It helps detect the amount of moisture in your clothes during the dryer cycle. If you notice your clothes are still wet after an automatic dryer cycle is done, you may need to replace the sensor. You will find the moisture sensor behind the lint screen. Be sure to disconnect the power source from the dryer before you begin this repair. Note: Some model's require two sensors, please order quantity needed. Sensor only, harness is not included. This part is sold individually.