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If the circuit board in the control panel malfunctions, the dishwasher may stop in the middle of a dishwashing cycle. Reset your Smeg dishwasher to have it working again as soon as possible.
Open the dishwasher door and quickly close it. Make sure that the door latches properly; you should hear a soft "click" as the latch engages.
Locate the "On/Off" button on the left side of the dishwasher control panel. Press and release the "On/Off" button to turn the appliance off. Press and release the "On/Off" button a second time to turn the dishwasher back on; the "Power On" indicator light above the "On/Off" button will illuminate when the appliance is on.
Select and run a dishwashing cycle to ensure that the dishwasher control board has been reset successfully. Press the appropriate "Program" button to the right of the "On/Off" button; the LED lights above the five programming buttons will indicate which program has been selected. Press and release the "Start/Stop" button to start the selected dishwashing cycle.
If this doesn't help you will need to replace the circuit board
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Hi to you from David, 'The Famous Forry'
I will look for you now and come back to you with my findings within 10 mins. Thankyou.http://www.buyspares.co.uk/smeg/dishwasher/ukstx1/catalogue.pl?shop=smeg&path=110813&model_ref=259699&illustration_ref=100102 Above is a link to order the PCB or any other ppart that you may require for your appliance, regards David 'The Famous Forry'