Freezer is slowly getting warmer - water dispenser won't dispense (occasionally) turbo cool won't work
Open freezer door and look for any frost on the back wall inside the freezer. That would indicate a defrost problem.
Disconnect power to refrig. Unload freezer, Remove shelves and back panel inside freezer. Melt frost with a hair blower. Replace defrost heater located at the bottom of the heating coils. (Note: It may look different than the original, but insturctions enclosed with replacement cover that) Might as well replace the evaporator thermister at the same time, as your problem is about 98% of the time one or the other of those parts. The thermister is a white pencil shapped item, about an inch long, located cliped to the top of the cooling coils you just defrosted.
If you don't have the parts on hand, defrosting only will get your refrig working again for several days, while you obtain the parts.
Note: non-water dispensing is the result of the cold air from the freezer not being able to continue over the frost blocked coils, so it migrates back though the return air vent in the bottom of the refrig, resulting in a frozen water line, and often freezing in the bottom bin of the refrig.
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