how can i fix my hotpoint dish washer model hot-dw70s?

have your water pressure checked. by law the water board have to make sure you have a min of 1 bar pressure.
i can't see that your pressure will be lower than that.
do you have good pressure at your kitchen cold tap ?
and iv'e never seen a dishwasher play up because of water pressure.

hi-spec plumbing
June 2007