Whirlpool dishwasher ADP 4601

[hecticheron]

I have 4 flashes! I've taken out the trap and cleaned it, cleaned the silver mesh at the bottom (it was v gunged up) There was some water in the sump - I've taken it out and filled the sump with boiling water and left for 20 mins. When switched on again - it drained most of the water out then went back to 4 flashes again! I've run out of ideas!
I've tried holding in the start button, - no effect!

Any help gratefully welcomed!
thanks
Karen

 

[Sleepyhead]

Under the mesh filter in the bowl area is a black grid. Carefully clean it out and don't damage the membrane inside.
This is the likely cause of the problem.

 

[hecticheron]

if i remove the silver mesh panel at the bottom, there is a sump, with some water in. there is a small rounld black grille on the right hand side wall of the sump - is that the bit you mean? I see from other posts that some people said that there is a pressure switch under there.. I can't seem to remove it. how do i clean it out? Hot water didn't clear things...
(and what happens if it is punctured, and how can I tell?)
Thanks
Karen

 

[hecticheron]

if i pour boiling water in the sump, and then either leave it for 10 min, or immediately after - It DOES pump the water out (most of it)..but then it stops and does the 4 fashes repeat again.
Stumped.

 

[Sleepyhead]

4 flashes is a draining error. That black grid contains a pressure switch that isn't working properly. You can't remove it from inside. Try cleaning it out with a toothbrush.