Whirlpool ADP 4305 WH blinking 4 times

[HLangius]

Never had problems with the dishwasser.
But now the light is blinking 4 times.
Pull out the baskets, cleanend the filters and sprayarms and fill it up with water.
Put it on reset (pushing the bottun for a couple of seconds), starts again
and is pumping the water out.
Afterwarts its still blinking 4 times.
Can someone tell me what that means and what to do about is.
Dont have a manual with it, so I can't search on it.

 

[zipper]

F4 is a drain error, most likely a clogged or defective pressure switch if your pump works fine when reset. There are many good posts on the forum covering F4 issues. Use the search facility & type in "Whirlpool F4" or "4 flashes" you will find plenty of pointers.