problem with hpt 7822 dishwasher….water intake overflowing from waterjacket.
have removed float switch unit..cleaned..infact on water intake float switch activates fine. On final fill of water jacket, water topples above float switch chambe and als out of overflow outlet.
have checked for normal gundge up pipework..all clear manchine working fine on other operations as normal
Do please double check the black rubber hose is not blocked or indeed perished as that is the main reason this happens!
Also, next thing to check is at the top of the water tank where the PVC fill hose connects, the nozzle scales up and gets restricted. That forces more water to fill through the vent, thus overfilling!
Take that PVC hose off and give the nozzle aperture a poke clear 😉