Machine chugging, no water entering the machine?

there is a float and switch in the base of the machine that will stop it accepting any water if there is a leak inside the machine.

The switch may have activated and may now also be stuck in the activated position.

A bit more searching would show you things like this:

http://www.fixya.com/support/t363608-drain_pump

This may help, on the assumption that, as AEG is now effectively Electrolux, there may be some similarities:

http://markrobertshaw.com/2017/02/09/how-to-reset-the-anti-flood-device-on-your-electrolux-dishwasher/

kujhfh
October 2017