I have a whirlpool Dishwasher model ADP7406. The dishwasher stops mid cycle with a fault code F3 displayed in the digitial display. First time this happened, there was a switch trip in the mains. The sal indicator was not blinking so I assume there was enough salt. But our landlord is now saying that the problem has been caused due to low salt level? We think there was enough salt as the salt indicator was not blinking and this has nothing to do with the heating fault F3. Could you please tell us what is fault code F3 and what causes it?