Timer clock won't work on perm press cycle . Just runs for ever. Motor OK, heat OK door switch OK , start switch OK.
Timer works on timed dry cycle ,shuts off heat but keeps running over to next cycle.

It sounds like you have a set of contacts welded together on the timer. Try unplugging unit and taking off rear cover of control panel and rapping on back of timer with handle of screwdriver. That may unstick the contacts, otherwise, replace the timer.