My dryer turns on does heat but does not shut off. I replaced the timer with a used online. still I am having the same problem. If I put it in "no heat dry" it runs its minutes and shuts off. If I put it in premanent press or regular cottons it does not shut off just keeps heating and drying way beyond the time needed( until it is manually shut off). this is an automatic model wich is suppopse to shut off when the clothes are dry. I now their must be a switch/sensor of some sort that cotrols the automatic feature. how can I go about truoble shooting this futher to make sure. I am very handy with all electrical testing equipment etc. I know that the sensors are located with the heating element on the back of the housing were the drum mounts up( i have replaced this in the past) I also know that thier is 2 to 3 different sensors and switches on the back of the dryer. Can some one explain this futher on wich switch does what and wich one I need?