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If the refrigerator is too cold, pull everything out of the refrigerator and remove the bottom crisper drawers and such. You need to remove the lower back cover panel 799 on the diagram in the link below.
CLICK HERE for diagram
If the silver coils are packed or have clumps of ice, use a hair dryer and thaw it out because it can cause air flow issues. Other than that, the refrigerator thermostat would just need to be replaced if it's colder than your set temperature.
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