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Whirlpool ADG 7540 Dishwasher

Discussion in 'Appliances' started by brenny, 30 Oct 2010.

  1. brenny

    brenny

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    If anyone has any info on above would be great. Recently washer is unable to complete full cycle. Beeping noise after approx 20mins. LED flashing 4 times. Washer 8 years old, first time this occurs.
     
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  3. zipper

    zipper

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    F4 = drain issue. Scroll down to the bottom of this page & check out similar topics or use the search facility. There are plenty of posts regarding this problem.
     
  4. brenny

    brenny

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    thanks zipper
     
  5. brenny

    brenny

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    Having read previous posts on this topic. (Start button flashes 4 times). Drainage problem.

    I selected 70 deg (intensive) setting and ran machine. I opened door at intevals to check operation. Machine ran and filled with water ok. Base of machine covered by water. Checked base after approx 20mins and no sign of any water?

    Machine ran for approx 30 mins in total and beeping re-occured. Pre-rinse LED on and start button flashing 4 times between pauses. Again no sign of water on base! Not sure why?

    Apologies if this has been covered before but I am confused.
     
  6. zipper

    zipper

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    Take out the filters & look in the right hand side of the sump for one of these little chaps http://shop.ukwhitegoods.co.uk/Dish...%2526+Others+Dishwasher+Diaphragm+Switch.html Your pump may be functioning correctly but the pressure switch might be clogged or even defective. A common problem is that the grill gets gummed up with residue/bits of labels etc & the machine "thinks" it still has water in, hence the F4 alarm. Give it a good clean, or even better lie the dishwasher on its back & remove the bottom plate. This gives you access to most parts & the pressure switch is easily removed from underneath. Clean it well & if you have a multimeter check if it is switching ok by poking a cable tie or similar through the grill to activate the diaphragm.
     
  7. brenny

    brenny

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    Spot on zipper

    Having followed your instructions all sorted now.

    I removed the pressure switch and disconnected the connector plug on wiring loom from same. On inspection part of the connector plug appeared to be "melted" (may have been a loose connection). Pressure switch contacts were also damaged and diaphragm was not switching when tested.

    Fitted new pressure switch and connector. Ran to test. Perfect. Happy days.

    Thanks again for your help.
     
  8. zipper

    zipper

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    Good job:cool:
     
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