What does f20 mean on the duet steam washer?
After a time the small hose that comes from the pump area to the pressure switch located at the top of the machine can clog. Unplug the machine. Remove the top or the back of the washer. Locate the pressure switch near the top of the washer. It is about 4 in round and has wires and a 1/4 inch black tube attached to it. Pull the tube from the switch and blow through the tube until clear. Reassemble, plug in and test.