Zanussi zdt41 dishwasher not cleaning

15 Aug 2022
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My zanussi dishwasher has stopped cleaning dishes. Water is hot but a residue is getting left on dishes. I cleaner filter and spray arms but still not working. I pulled out the dishwasher and noticed that there is a grey hose connected to white thing on top of dishwasher but not connected to anything at other end. Can anyone help?
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Residue is often down to lack of rinsing dishes before placing in DW.It’s not a waste disposal and pump slowly reduces food to a fine grit which is then left on dishes.
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Had something similar on a 9 year old Whirlpool, found waste pipe almost completely blocked with what looked like washing tablet residue which was softish and easily removed after I took off the drain hose.

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