CAUSE: Found refrigerator water filter housing failed, water filter suck to housing. CORRECTION: Replaced refrigerator water filter housing and tested for leaks. Operation now normal. No leaks upon completion. CONCERN: Customer reports refrigerator water dispenser inoperative. DIAGNOSTIC AND CAUSE: Inspected water supply line to refrigerator for leaks, no leaks found at this time. Inspected water valve for leaks, found water valve failure. CORRECTION: Replaced water valve and tested. Operation now normal. No leaks upon completion.