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I’m sorry to hear you're having trouble with your appliance; I know that can be frustrating.
Hopefully, we can get this resolved quickly.
3 beeps indicate water has leaked in the base of appliance and activated anti flood device.
You can unplug it and pull it out, then tip it backwards by around 45 degrees so excess water drains off completely.
Then clean the drain pump and check the waste pipe for any clogs.
If this is Integrated unit then remove the inspection panel and clean it with a sponge, make sure it is all dried up.
Then plug it back and see how it goes.
If the problem appears again, you will have to check what is causing this leak.
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