My dryer is 5 years old and started humming out of no where? Ive cleaned lint vent, I made sure there was no obstruction in blower fan, belt is not broken, and made sure door sensor clicked. What else can I check?? I can't imagine motor would go after only 5 years? could the thermal fuse casue this? I just had my matching washer fixed last year, I love samsung but if i have to replace might be switching.