Washer Fills But Then 3 Beeps And Begins To Drain.

See https://www.repairclinic.com/RepairHelp/Washing-Machine-Repair-Help. The links most likely to solve are listed in the second column, second and last.

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Start the washer.
R26; Close the washer lid. The washer will not operate
with the lid open.
R26; Push in or turn the cycle selector knob or turn any
option knob to "wake" the washer. You will hear
three beeps to indicate washer is ready to operate.
R26; After making your selections, push in the selector
knob to start the cycle. You will hear one beep and
the washer lid will lock.
R26; Unless a manual water level is selected (if available),
the washer will perform a dry load sensing
procedure before adding water to the tub.
R26; To add a forgotten item to the wash tub, push in
the cycle selector knob to pause the cycle. You will
hear two beeps. After the lock releases, lift the lid
and add the item. Close the lid and push in the
selector knob again, continuing the current cycle.
R26; To stop a running cycle, push in the cycle selector
knob. Go here for the manual if needed.

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