Hope you can help me. Not quite sure of the age of this elec dryer, picked it up used. After a couple of days of heavy use, it just stopped working. If you set timer an press start, you can hear a soft humming noise at the start switch and you can hear the timer. no humming or buzzing down at the motor. Checked thermal fuses, heating element, and themostats for continuity, all seemed ok. Motor spins freely. What else can i test?