Manually push it in until you hear a soft "bang " I had to do it few times until it started dispensing water.
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Before I did what I explained above, the only time the refrigerator was dispensing water was when the old filter was on, or when there was no filter at all. I was without a filter for almost 6 months. Until I decided to give a try for the last time.
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Try pushing it several times and twist it until it dispenses water. It works!