It will be leaking because that is what F1 error means. There is a float switch down below which will operate when water is present. Turn power off at wall, remove the lower panel under the door(2 phillips head screws mounted vertically on either end) Look through opening & check for water present. Dry it out completely. Get as much out with a sponge then use a hair dryer if you can. Then power on & run machine while you watch through the opening to see if any water starts coming back & where it comes from. One usual source of leaks is the rollers for the top tray which are screwed to the inner wall. Make sure the screws in the centre of the rollers are tight. Do not touch any wiring inside when power is on as some are live at all times. Switch off before putting your hand in.
Lincoln Appliance NZ, June 2009