F7 occurs when there is a flow meter issue. The device is located in the left-hand part of the machine and looks like a plastic tank.

To clear the error, please, do the following:

Disconnect the power.

Put the dishwasher in a place where you can work on it conveniently.

Remove the top (in free standing dishwashers).

Remove the left-hand panel.

Open the flow meter (the plastic tank, as described above).

Pull the small plug off and on several times to clean the connection.

Try a cycle again.

If it does not work, address a technical support service.