Thank you for your replies. I concluded that the problem must be with the timer. Since the airflow is good, and the drum turns, the heating element has 9.6 Ohms across it, and the thermostats are good, it must be the timer. I called Sears to buy another one, but they say a timer for this unit is no longer available. I don't want to trash this entire unit because it fits so well in my apartment. Is there another source for timers? Is there a test for timers? I can remove the timer but it requires removal of a faceplate and that requires drilling out a couple of rivets. Not a big job however.