Update: i entered diagnostic mode and it seemed to hang up there....only got through 5 min of what the looks like should be a 16 min diagnostic cycle. I was ready to declare the control dead.
However I then performed the test described in the "checking keypad operation" section, where you disconnect the keypad ribbon, reconnect power and close the door. The drain motor ran for 2 min and shut off, and this guide says that means the control is ok. Now I am not sure where the issue really is.
Any advice? Thanks!