The dryer is showing a FO1 fail sign. Could you tell me how to access the control board to try and mend it. Model Number is WED8300SW.

The F01 error is an internal failure of the main control board. You just have to replace the control board to fix it. The control board you need can be ordered from the linke below:

https://prismparts.com/products/oem-whirlpool-dryer-electronic-control-board-pp2805106

The video below gives instructions on how to access and replace the control board.

https://youtu.be/Si4K9IrwYyM