1 of 3 things. Either inlet water valve is not shutting off. Check by starting the fill process & then open the lid or press pause. Water flowing in should stop without any hesitation. Try it several times. If water shuts off then valve is good. If it doesn't then replace the valve. Second thing is the air pressure tube may have a hole or split in it. Take back panel off machine & locate rubber tube on right hand side going from the bowl up to the top panel. Check as far as you can for any holes or splits. If found replace the tubing. Lastly it could be a faulty level sensor but that is part of the main control board and can't be replaced on it's own.
Lincoln Appliance NZ, May 2014