Kenmore Elite Dryer won't keep running

Dryer will turn on if the start button is held in but shuts off once the start button is released. If I hole the start button down to make it run it does not appear to be heating. Any ideas on what the problem is?

Here is the tech sheet
http://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%203979101.pdf

Try to get into the diagnostics.

Check the Motor Relay’s coil for continuity.