Hi, my name is Peter.
Did you bleed water out of the dispenser at the door when you change the filter. Approximately 8 big glasses. If you did then take the filter out and reattach it. If you still do not get good water pressure at the door then check the water pressure where it hooks up to the refrigerator from the house. If that is good then you probably have a plugged water valve and need to replace the valve.
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The ice maker is also not getting enough water to make ice cubes. Would your suggestion help with that? Is there only one valve that might need replacing? If yes, where is it located? Thank you.