My Whirlpool dishwasher ADP7408 is not working and is displaying F4 in the electronic display

turbid water!

Whirlpool Dishwasher Error/Fault Codes - eSpares

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FA (or 11 flashes) - Optical water indicator (turbidity) ... This fault indicates an error with the sensor in your machine that monitors the water cleanliness. If ...

Whirlpool Dishwasher Error Codes - Lights Blinking Flashing

https://removeandreplace.com > ... > Dishwasher Repair
Mar 9, 2016 - Some Whirlpool dishwashers display an error code by flashing the clean Light on the display in a pattern.

Whirlpool ADG 7560/2 pumps in water, then beeps with error ...

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3 days ago - Dishwasher - Whirlpool ADG 7560/2 pumps in water, then beeps with error and 11 flashes. My dishwasher started faulting.

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Hi.

F4 points at at a drain problem, often the problem is caused by a dirty or defective pressure switch. Before replacing the pressure switch it is necessary to test the drain system.

First try turning power off from circuit breaker for few minutes and see if that is enough to clear the error code.

Turn power off from circuit breaker (or disconnect power cord) and clean the drain well inside the tub. Remove any water present in the tum. Check also the drain hose at the back of the appliance and make sure it is not kinked or blocked.

If that does not work remove the kick panel at the base of the dishwasher, locate the pressure switch and clean the hose connected to the pressure switch. The pressure switch is the device that detects water level, determining when to start and stop the drain pump. The pressure switch is a small plastic switch connected to a long rubber hose. If the hose gets blocked with detergent or if the switch is defective you get f4.

Resuming:

Try resetting the appliance to clear the error code.
If that does not work clean and check the drain system.
If still no luck check the pressure switch.

Disconnect power before doing any maintenance.

Regards.

Ginko

Hello

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.

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

Posible mailfunction reasons:
The drain pump must be defective/blocked
The siphon would have got closed
The control board would have got damaged
OWI defective

check thermostat and heating elementwires and timer

The F4 error code on your washer indicates a problem in the electrical circuits of the washer... and not end-user repairable.
This problem requires a technician to test the wiring circuits to diagnose the problem.

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I had the same problem. Indicator flashing. F7 displayed. Nothing seems to work. The following worked for me: Remove the filter on the floor of the machine, including the metal grill. Press & hold the start button (like you do when you want to cancel a programme). this will drain the water out of your clogged up drain outlet. Clean your filter and grill and replace it. My guess is that the sensor in the drain (a little glass tube) measures whether the water going out is clean enough to decide that your dishes are now rinsed correctly. If your filter's clogged, the water going down the drain is still dirty. After a while it gets sick of trying and stops the machine. F7 in whirlpoolese may mean "Clean my filter now or you can wash your own bloody dishes"

sound like you have a valty inlet valve if your model has the valve built into the hose you will have to replace the hose assy.

will these units (silo and jtrip) start back on their own? if so, it is likely they are heating the water.
otherwise it sounds like a logic board, unless there is a defective door switch or sensor issue.
electronics seem to be a recurring problem with whirlpool.
i would ask whirlpool (electorlux) to either buy it back or fix it.
good luck
mark

We had same problem with our ADP 5966. An engineer over the phone said he thought it was related to machine being unable to drain. I checked the drainage pipe connection to u-bend under sink, and sure enough, there was a major blockage. Cleared that and hey presto, problem solved.