Problems with Bosch CRI 45M EV ⇐ Bosch

[He will swing]

I have been using a Bosch CRI 45M EV dishwasher for 12 years now. No complaints during this time, but I encountered the problem that jets of water come out, but do not reach the dishes and do not spin the rocker arms, but simply give fountains of 3 centimeters, while the water does not heat up and the program restarts on its own at the moment when it is necessary to start heating the water . When simply rinsing with cold water, the program runs to completion and simply produces weak streams of water. I would give the car in for repairs, but the workshops are closed, and there is some distrust of visiting mechanics, and it’s scary under quarantine conditions, so I ask for help from more experienced ones. What could it be? How to diagnose? Is it possible to fix it at home without special equipment? Where can I order spare parts? Thank you in advance.