My "proper old" Hotpoint had a mechanical interlock that let you open the door the moment the drum came to rest, the new "Indesit/Ariston/Hotpoint" makes you wait ages with a thermal interlock.
My "proper old" Hotpoint had a mechanical interlock that let you open the door the moment the drum came to rest, the new "Indesit/Ariston/Hotpoint" makes you wait ages with a thermal interlock.
That would explain them not being instant, but why on earth make them so it takes a full three minutes? Thirty seconds would be more than good enough, with plenty of leeway and you could design such an interlock for roughly any time you wanted.
Actually
see
How a washing machine door interlock with time delay works.
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