Dishwasher Noise: What Does It Mean?
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Some noise from a dishwasher is normal — the sound of water spraying and draining. But grinding, banging, or loud humming indicates a fault.
Common Causes
Grinding or Crunching
Often caused by a small piece of broken glass or debris trapped in the pump or sump area. Remove the filter and look for foreign objects.
Loud Humming
A constant loud hum during the wash cycle usually indicates a failing circulation pump. Pump replacement costs £90–£160.
Banging or Rattling
Dishes or cutlery that are not properly loaded can rattle or bang against the spray arms or basket. Check loading before calling an engineer.
Grinding During Drain
Grinding during the drain phase points to the drain pump. Something may be jamming it, or the pump bearings may be worn.
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