E1 and f4 error

SOURCE: Whirlpool dishwasher

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.

SOURCE: error code f4 on my

Blocked waste outlet or maybe just a worn pump.
I fixed a new one today showing F4
I found a piece of broken glass stopping the waste pump.
Hope this helps
john

SOURCE: Whirlpool Dishwasher machine (Mod. ADG 8970/1)

Hello Sir,
This error code, " F4 " comes only when the waste outlet is totally clogged with waste and blocked. Try to dismantle the machine and locate the Waste outlet pipe and thoroughly clean it. This will reset the error which is caused.

Thank you Sir, 
Have a nice day.

SOURCE: i have an error code f4 on my whirlpool adp 8966

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

SOURCE: Error code F4

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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