It would be helpful to know how far into the cycle does the error show up.
Also does it go away when you turn power to dishwasher off and back on.
If you can operate the dishwasher then try in Rinse only and see if it completes the program.
If the error F6 is happening on all cycles within 3 minutes of start of cycle and water is filling in partly, then it looks like the flood switch at the base is triggering. This also means it is trying to pump water out everytime.
There should be a float at bottom of dishwasher which is either faulty or something is stuck under it.
I am assuming you have tried other means to reset the dishwasher like turning the mains power off and back on again.
Final solution: the display indicate Fb not F6, the green led flashes 12 times,the error code for whirlpool dishwasher indicate for : Fb 12 flashes: substitution motorised Diverter Valve(flow diversion(MDV).
Substitution valve assy broken, the dishwasher is ok.
thank you for assistance
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all programmes indicate error F6 after 3 minutes of work, water is present inside the dishwasher, lower blade turn , upper blade no.Short washing(14 minutes) indicate error F6 after 3 minutes.
Switching on:all programmes unload water, after load water, the blades must turn, lower is ok , upper no,Display indicate F6, green led flash 12 times
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