WP Touchpad does not work.

Whirlpool GS475LEMS1 gas range displayed error E1 F2. Replaced entire control (and keypad) with new part and display still shows error E1 F2. What else has failed?

The error code of F2 and E1 on your gas range is indicating a keypad failure or an Electronic Range Control (ERC) board failure. The ribbon connector on the keypad could be damaged or shorted. One of the buttons could be stuck or shorted on the keypad. There is a good possibility of a failed (ERC) board as well.
I recommend having a service technician come out and diagnose which part failed and repair your range.