What's the part number for the control board and thermal fuse on a WED8300SW1? Also do you access from the top or bottom panel?

The control board you need for that model can be ordered from the link provided below:

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

The fuse you need is : 

https://prismparts.com/products/for-whirlpool-dryer-dryer-thermal-fuse-part-number-pp5238006x66