Optima G2430 Miele dishwasher with intake/drain flashing light
F13 is an inlet fault.
First the unit drains and then fills with water. When the unit has intially drained open the door and manually fill the unit with water, about 5lts. This will then allow the dishwasher to go to the next step which is to circulate the water. If this works ok then the water tap is defective, water inlet valve is defective or the electronic unit is not sending the signal to activate the valve. The water inlet valve is the white square box attached to the tap. Remove this and check the filter and make sure water comes out of the tap.If ok then remove the bottom panel of the unit under the door. On the right hand side there is a 2 core cable with a male and female connector. Unplug this and check for voltage from the electronic when the unit goes to fill with water. If there is 240v then the electronic is ok. You will then need a new waterproof system from Miele.