CONCERN: Customer reports GE Refrigerator is not cooling properly at times. DIAGNOSTIC AND CAUSE: Test compressor operation to see if the compressor was running. Compressor was running. Tested for voltage from adaptive defrost control board to compressor. Voltage from the main control board to the compressor normal at this time. Cause of failure most likely ADC main control board relay sticking. CORRECTION: Replaced ADC main control board and tested. Operation now normal.