Re: Hotpoint Ultima 1200 WD71 – E15
If the machine fills and empties with cold water on the rinses then the pressure switch is unlikely to be at fault. In fact the pressure switch is one of the more reliable components in these machines. Several other causes can give E15 particularly as you say it is emptying OK. There is very little you can do with a pressure switch, it is a sealed unit.
If you read through most of the thread you refer to you will see that the general consensus at the end was that the pressure switch was not at fault.