Fridge and freezer are not cooling.

With access to cleaning and replacing suspected parts, you should be able to do a simple test using your hand as a crude thermometer; feeling the compressor discharge coils and freezer compartment for hot and cold refrigerant. The basic refrigeration cycle; compressor discharges high pressure refrigerant that's hot, cooled as it travels thru the condensor coils, turns gas to liquid, discharges thru a tiny capillary tube where liquid refrigerant is allowed to expand and return to its gaseous state while absorbing heat from freezer coils, returns from vacuum generated from the compressor and repeat the cycle. If the compressor is running, you should feel its output tube going to the condenser coils as hot. The freezer coils, under the floor (top freezer) or rear (side by side) with fan moving air for circulation, should be cold. If both sections are lukewarm, either the system leaked refrigerant or the compressor failed internally. In either scenario and the compressor is running, replacing the compressor, filter/drier and refrigerant requires professional repairs unless you have skills and equipment to make repairs.