Model # AGD4675YQ0 Admiral Gas Dryer. Dryer started humming after one load completed. Scenario, Emptied dryer, Loaded up the dryer, closed the door, turned the dial to our usual setting, dryer started to hum. Did not touch start button. The hum happens as soon as the door is closed and the dial is turned to an on setting. Motor will not start, can manually start the dryer by turning drum, but start button is never pushed. Any suggestions, purchased a new motor but don't believe it is the motor.