I have a Bosch Exxcel dishwasher that was showing a E24 warning light this morning, as was was my nose at the smell of the kids stale milk residue from yesterday. This is the not first time this has happened, and aclean out of the pump filter soon had the machine draining again. However it now exhibits a new and stubborn problem. The new error code is E15 and the water supply light is on. This happens as long as the mains electricity supply is switched on, regardless of whether the "on" or "start/reset" buttons have been pressed. The supply hose is completely empty and I have disconnected it to check that there really is water supply to the hose. I was wondering if the Aquastop valve has functioned inadvertently, but if so, how do I reset it? Or indeed, are there any other microswitches that could give rise to this error code.?