filter blockage ,
or pump problem.
filter is HIDDEN inside the large black hose that leaves the bottom of outer drum(remove the rear lower panel) .Manually drain the excess water out via the drain hose place end into a bowl now lower to the ground, water should flow out by gravity, when water stops prepare for spillage with a couple of old towels and a shallow container undo the clamp on the bottom hose by squeezing the clamp tails together, clean out the filter, and clean/check out the pump at the same time ,check the operation as a replacement maybe required
wirecutterman, March 2009