CONCERN: Customer reports refrigerator is not getting cold on refrigerator side. DIAGNOSTIC AND CAUSE: Inspected compressor operation, evaporator fan and condenser fan operation, all normal. Found frost build up on evaporator coils. Tested defrost heater for continuity, Found defrost heater and limiter shorted. CORRECTION: Replaced defrost heater and limiter. Tested operation, all normal upon completion. CONCERN: Customer reports refrigerator seems to run all the time. CAUSE: Found condenser coils clogged with debris. CORRECTION: Clean condenser coils and tested, operation now normal. CONCERN Customer reports refrigerator water filter : CORRECTION: install water filter and tested. Operation now normal.