You probably have a bad timer. My guess is the contact for timed dry is burnt out. Most folk like timed dry and it gets used the most. You can sometimes file down the contacts and get her going a little more. You MUST carefully remove the small mechanics stopper retainer from the timer shaft. If you fail to do so you will cause further damage to the innards, Use a small file to smooth out any burrs ya might find. If you however have one gone this bad as in the picture yall gonna need to order another timer. Click on pic to enlarge: