electric dryer shuts down

I have a LG electric dryer. It comes on for about 3-10 seconds and shuts down, not off. I will try to restart after a few minutes but stops again. I replaced the thermostates and it worked for about 3 or 4 days. It started doing same thing. If I leave front of dryer off, it will run. Sometimes before it stops, it may smell hot. any ideals?