From where the blazes do you get "aristotle" ? As far as I can see the machine is an Ariston Aqualtis AQ9F 29 U.
I am also mystified by "Door Release Cord" - As far as I can see the door release is a handle.
Do you mean the cord that holds the rubber seal in place around the opening into the drum?
Is it like one of these?
http://www.4ariston.co.uk/washing-machine/aq9f-29-u1-ausv-062380/clamping-ring-bellows-seal/product.pl?pid=1159336&path=600118&model_ref=3584099
or
http://www.4ariston.co.uk/washing-machine/aq9f-29-u1-ausv-062380/bellows-clamp-tank-front/product.pl?pid=1159337&path=600118&model_ref=3584099
I normally use a small pair of pliers to stretch the spring, whilst holding the other in place. Its a complete faff. Do a bit of searching and you may find a YouTube video that's helpful
Anon
November 2016