Hotpoint washer dryer

Checkout:
https://www.hotpoint.co.uk/appliances-1/integrated-washer-dryers-3/hotpoint-aquarius-bhwd-129-1-integrated-washer-dryer-white/F071778/

you should read the catalogue.

this could be just a sticky switch staying stuck on, telling the dryer it has a full tank try soaking the switch in switch cleaner or wd40 may work

did you check the drain filter?

Open up the top of the machine. Plug off the wall mains. Turn off the wall faucet. How is the wire connection for the inlet valve, the water inlet. Fine? If not unscrew the inlet valve from the corner of the machine after disconnecting the hoses, & dismantle to clean it up, re-assemble, refit back to machine.

Could be a sticking water level switch, which controls the water level, or a blockage in the hose to the switch, or a trapped or split hose to the switch. the hose in question is about 6mm in diam,and goes from the sump hose to the pressure switch,if u remove the hose from the preesure switch chamber, check for a blockage there, and blow down the hose to see if it is clear, u should hear the switch click if it is clear, if no click and hose is clear, then I wud say the switch is faulty.
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No it will not keep filling when it is unplugged.
The problem is probably due to a sticking water level switch, or a partial blockage in the water level sensing system. \you will probably need to call an engineer.

the printed circuit board is gone

The water level vacuum switch are not working , check hose might lose.

Have suffered the same problem. Suggest you remove back (after turning off electrical supply) and look at the water outlet pipe - you may have a sock or two in this - remember to reattach outlet and secure in position.