Can anyone help pls? Our dishwasher seems to have developed a fault insofar that the detergent door does not now appear to be opening, meaning that dishes are being washed in hot water only. The latch is free to move and still has spring tension in it, but obviously without stripping down the internal door fittings and mechanisms, I can't see if there is a problem there. Is this a common fault, the m/c is less than three yrs old and replaced an ancient hotpoint model which would have been dearer to repair than to replace. Will this be the case again? Many thanks in advance for any assistance/advice.