Question about Whirlpool 24 in. DU930PWP Built-in Dishwasher

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Whirlpool diwasher adg 9142

The power is on but it's showing an error message f4 and has a little water taht won't empty. the righthand start program buuton is also flashing.

Any help greatley apprecited.

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Check the inlet strainer at the bottom of the machine for blockage.

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Posted on Sep 21, 2010


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Whirlpool dishwasher adg 642 not working start light flashhin 4 times

Hello Faye,
The F4 error code is a drainage error and it means that the control board did not detect a drop in the water level in the tub so it thinks it didnt drain.
The things that could cause this are a clooged filter on the pump asm, a blockage in the drain pump or hose or even a defective control board if in fact all the water has seemed to drain out of the tub.This is how ya set the diagnostic test to clear the codes and see if it reoccurs
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  • Press the start button once and close the dishwasher door.
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  • Nov 05, 2011 | Whirlpool 24 in. ADG7540 Built-in...

    1 Answer

    2LYMPAIA - F4


    If you have F4 and the sump is full of water, there's a good chance the drain pump is being jammed by a broken bit of glass or pottery. However, if the appliance is empty of water and F4 error code is flashing, where do you go from there?

    The electronic control (module pcb) does a self check of the components, during a drain cycle the programme allows a time parameter for the appliance to empty away the water. How does the pcb know the water has gone? Simply by testing a pressure switch for continuity.

    The pressure switch is an on or off switch, when the appliance is empty the internal contacts are "made" (on) when the appliance is full of water the switch is "broken" (off).

    The sensing grid of the pressure switch is exposed to the dishwasher wash water and can over a period of time get clogged with crud ( a mixture of food waste and detergent and limescale), eventually this crud stops the switch from being in the correct attitude during the self tests. The electronics notes the on or off and determines that the appiiance has not drained and gives error code F4.

    If you have F4 error code it could be the pressure switch needs cleaning or replacing.

    On the self test about 4 mins is allowed for the appliance to empty the water away.

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    I have an error code f4 on my whirlpool adp 8966 dishwasher can you tell me what it means please

    F4 indicates draining failure.Your washer drain pump starts and after 4 minutes the OWI(optical water indicator) detects that mashine is 'not empty'

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    Thank you Sir, 
    Have a nice day.

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    There may be excess water in the water reservoir. Empty the washer Turn it off at the mains, and unplug it, then put some old towels on the floor, tip the washer forward until the excess water comes out, Reconnect and try again. Hope this helps it works for me and saves ££££'s in repair fees

    Oct 04, 2009 | Asko W6461W 24" Front Load Washer w/ Delay...

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    Program shows shows f4 and peeps

    F4 indicates


    drain pump starts and after 4 minutes the OWI detects that mashine is 'not empty'

    posible mailfunction reasons:

    drain pump defective/blocked
    siphon closed
    control board defective
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    remember to unplug it from power if any repair is done
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