When the washer go s on rinse the prewash flashes Problem

Victor. The prewash flashing is indicating a water fill issue. Rinse uses cold water only. check for clogged inlet screen on the cold water valve, and check if there is a screen on the supply valve also. If the inlet screen is all clogged up at the valve on the washer, you can clean it with a little windex and an old soft tooth brush. gently brush away any sediment or debris. If no filters are clogged, you will need to replace the fill valve assembley.

If your PreWash is flashing then you have a pressure problem. You can dry using a washer machine cleaner or doing a hot cycle with white vinegar. If that doesn't help the electronic would have to be changed.

Unplug the machine for at least half an hour to eliminate the possibility of an electronic glitch. Then upon plugging in back, close the door then push CONTROL/ON (if present on this model). Select the DRAIN/SPIN cycle then select NO SPIN by pressing the SPIN SPEED button. Push PREWASH OPTION four times within five seconds. If PREWASH OPTION is not present on this model, press EXTRA RINSE four times within five seconds. C:00 will light up on the display. If the Starting procedure fails, push the PAUSE/CANCEL button then repeat the starting procedure.

In order to advance to the next step of the test procedure, push PREWASH OPTION button two times. If PREWASH OPTION is not present on this model, press EXTRA RINSE two times. The test program goes from C:00 to C:08 and should flash an error code when a problem is present. Post the code back for further troubleshooting, including the exact model number of the machine.

check pump/filter/outlet hose for blockages. if ok, check pressure switch (disc shaped item at top of machine with 4? wires and a tube) by blowing into it gently - should hear clicks, then blow into tube to pressure chamber - should be clear.

get it checked by and expert it sounds like the board has gone or the door lock is faulty

TRy priming by putting a jug of water in bottom of inside of dishwasher

No solution! tried resetting to factory defaults but ended up that even the drain pump stopped working. after flooding the kitchen (nearly). I decided it was terminal and am loking for a new dishwasher urgently as I type. Cheers.

sounds like water valve problem

The lights are set off by the balance sensors.And if your balance sensors are  stopping    it from spinning than you first have to make sure the washer is level.You  could have bad Shocks and a bad electronic control board,.                                    

Here's an article about this error code which may help:

http://fixitnow.com/wp/2006/04/09/whirlpool-duet-kenmore-he34-washer-f11-and-fh-fault-codes/