Hello, my Teka DW6 45FI dishwasher has started to play up this week – the programme starts ok, but seems to get stuck in a loop on the wash phase (for hours!) with a “beep beep” sound coming every so often before it goes into wash again (this happens on all wash cycle options) – any thoughts on correcting this would be great! (I’ve refilled the salt and cleaned the filter….) – thanks in advance!