Does anybody have any DIY experience with a Hotpoint FD W60 dishwasher
please?

My dishwasher leaked out the front door after not shutting off on the
fill cycle. However after mopping up the flood further testing seems
to indicate fault has corrected itself and the water now shuts off at
the correct level. Taking the thing apart I can only see what appears
to be a pressure sensor switch high on the left inside of the unit (to
which the inlet is initially piped up through before feeding the
pump). I assume it is this switch that failed to engage for some
reason but what worries me is the lack of secondary back up shut off.
There is no under unit drip tray with additional float valve and the
castle like overflow near the lower wash arm in this model is merely a
blanking plate (rather than an additional overflow into drip tray as
in other models).

Can't believe there is only the one flood safety shut off but my
experience seems to points to this for this model. Can anybody help
please?