I recommend that you pull out the water filter that is in the bottom front grill of the refrigerator. The housing for this filter has an automatic bypass so the water system will work normally when this filter is removed and it will not leak. See if the water pressure and flow from the dispenser significantly improves with the filter removed. If it does then a clogged water filter could be causing your ice maker and water dispenser problems. Replacing the filter may fix both failures.
If you still have problems with the ice maker, check the fill tube that protrudes into the freezer. You may need to
unplug the refrigerator
and pull the ice maker off of the wall in the freezer to access this fill tube. A low flow condition could have caused this fill tube to freezer. Defrosting it could resolve your ice maker problem.
If the water pressure and flow from the dispenser does not improve when you remove the water filter, I recommend that you shut off the water supply and remove the water supply line on the back of the refrigerator. Place the end of this supply line in a bucket and briefly turn the water supply cut-off valve on to check the water pressure and flow from this line. If the water supply pressure and flow from this line inadequate, then you will likely need to have a plumber fix this problem. If the water supply is good, then you could have a clog in the internal water system in the refrigerator.
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If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services