Hi Pete,
The “F2-E1” error code means:“Keypad keytail not connected”.
Remove the ribbon cable from the control board and check the tracks in the ribbon cable for hairline cracks using a magnifying glass. Clean the ribbon cable connector with a pencil eraser. Reconnect everything and give it a try. If it would not help then the control panel assembly has to be replaced.
Here are the breakdown diagrams and Replacement parts for WHIRLPOOL GBD307PDS09 | AppliancePartsPros.com
Gene.