Dryer would not stop running had to open door to stop

pulled the dryer out in the room so I had access to the back had to remove 6 screws with nut driver as i pulled off each wire i attached it to the new peice removed knob from front inserted new part with wires connected reattached knob to front. replaced the back of dryer. pushed back into place put in some clothes to test and set my kitchen timer just in case (sometimes I get distracted and forget dryer was running) and it shut itself off could not have been simpler