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You cannot program the pumps to run "filter cycles" anymore. The sock is in the circulation pump. Easy way to get it out:Get a wet vac. Unscrew the filter pipe in the filter area. Put the hose of the wet vac in the remaining hole and turn the vac on. Put your other hand over the other hole in the filter area (the one with the grate about 1/2" inside). Let that run for about 10 seconds. You should find the sock inside the bucket for the wet vac. If you don't, try it again.