Hotpoint-Ariston LI-480 brain on one side ⇐ Hotpoint-Ariston

[Uncle]

I bought this machine 6 years ago to complete the kitchen, and from then until last year there was only a test run. Last year I moved into this apartment and began to use it sometimes. But I have never been sure of a normal result: it will work as expected, then wait for something like that. Either it won’t wash, then it will stop with the water, then it will overfill the water (it’s good that I was at home both times). And the funny thing is, after breakfast you start the washer, in the evening after 7-8 hours you come, and it’s still washing something...
I disassembled the door where the brain is located, the contacts on the connectors were oxidized, I cleaned It worked, but not for long. Today I worked and worked, then I started squeaking like a radio operator in Morse code. She transmitted the code and began to pour the floor. There is a good cleaning vacuum cleaner. Didn’t let the neighbors flood.
Does anyone know what to do? I’m already planning to do a complete disassembly tomorrow, sometimes it helps. Only there is nowhere to read how it generally works and works.
Help!..