A couple of weeks ago my wife's Samsung stopped heating. I found an open thermal fuse, and cleaned out all the lint and hair out of the bottom of the unit, replaced the 2 fuses, themistor. It ran good for about a week and heat quit again last night. I was pretty confident the element tested ok, but also I didnt test the thermostat. What is the best way to test both of those accurately and does anyone have access to the wiring diagram for this dryer. Its an 07 model, but trying to get a few more years out of it. Thanks in advance.