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You have a blockage in the cooling unit. Once they have done this once they will probably do it again. The temporary repair: Pull the fridge out of the cabinetry. Turn it upside down. Beat gently with a soft rubber malet all over the pipes in the back of the fridge. Do not dent the pipes! Anything short of bending and denting the pipes is good. Re-install fridge and test run for 8 hrs. It may or may not work. If not replace or rebuild cooling unit or the prefered repair is to repalce the fridge. Replace/re-build cooling unit 50% (you install) 80% (dealer install) of new fridge with a much less good warranty. Good Luck