I have a whirlpool duet electric dryer that turns on but won't start after 5 seconds it flashed f01 code what should I do to fix this

Here is a manual: https://dl.dropboxusercontent.com/u/8010163/Whirlpool%20L-79%20Duet%20Sport%20Dryer%20Service%20Manual.pdf
What you need to do after you clean every inch of the inside is to solder the circuit board: https://www.youtube.com/watch?v=JRw_0eGkMAs
This is a common problem caused by a poor solder joint when many factories changed to the new higher melting point and lead-free solder. Look carefully at any components attached at the bad solder connection, like a bad resistor. Replace it if it's bad.