Re: smeg dishwasher dwi409c
favorite leak points are the upper spray arm tube at the rear just behind the circ pump or the screws around the filter being loose. other than that its usually the circ pump or the 2 o rings in the right hand (as you look at the front) side panel where the air break meets the water softner, not such a common leak point on these as it is on the 60cm ones though. You can remove the base with the machine in situ and watch for drips.