CONCERN: Customer reports Refrigerator is not cooling properly. DIAGNOSTIC AND CAUSE: Test compressor operation to see if the compressor was running. Compressor was not running. Tested for voltage from adaptive defrost control board to compressor. No voltage from the main control board to the compressor. Cause of failure found ADC main control board shorted at the output line voltage to the compressor. CORRECTION: Replaced ADC main control board and tested. Operation now normal. CONCERN: Customer reports refrigerator section is not getting cold but freezer is still working properly. CAUSE: Found back panel and evaporator coils covered in frost. Tested the refrigerator defrost bi-metal thermostat for continuity, refrigerator defrost bi-metal continuity failed test. Refrigerator defrost bi-metal has electrical short. CORRECTION: Defrosted refrigerator evaporator coils and replaced defrost bi-metal thermostat. Operation now normal.