I put a large load of towels and sheets in the dryer on Sensor Sanitize. It showed 1:07 (an hour and seven minutes) on the display. One and a half hours later, it was still running on high. Display still said 1:07 (an hour and seven minutes). Clothes were bone dry and smelled burned. 1) the Sensor feature did not stop the dryer when the clothes were dry, 2) timer did not count down and stop the dryer. Has happened twice. Bought dryer Aug 2013. Is this a known issue with a resolution?