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It is very possible that the coils have frozen over behind the back wall of the freezer, and it’s causing a defrost issue. If you are handy, I would unplug the unit and see if you can access the back panel. The fact you say the ice maker stopped as well is making me think there is an ice blockage somewhere behind the wall in the freezer, so try defrosting first. Now, what caused this can be several things, but that may get you up and running for now before you can get a tech in.