I can't start my dryer and the error code F01 appears. What should I do? Thanks!

That error is an internal failure of the main control board. The control board will need to either be replaced or rebuilt to fix the dryer. The boards are very expensive. The rebuild kit for the board is not that bad so if you know how to solder that is the way to go. The rebuild kit for the board is linked below.

https://prismparts.com/products/whirlpool-dryer-f01-error-control-board-repair-kit-version-3?_pos=2&_sid=b2e7182e2&_ss=r

The new board is linked below but like I said they are expensive.

https://prismparts.com/products/whirlpool-dryer-main-electronic-control-board-pp6826106?_pos=1&_sid=b2e7182e2&_ss=r