CONCERN: Customer reports freezer is leaking water into the back causing icicle formations. DIAGNOSTIC AND CAUSE: Inspected water supply line for leaks, no leaks at the refrigerator water supply line. Inspected internal water refrigerator water lines for leaks, internal refrigerator water line are normal at the time of inspection. Inspected defrost drain line for water leaks, found the source of the leak coming from the refrigerator defrost drain. Removed freezer panel to inspect for clogged drain line. Found the defrost drain restricted with ice and debris. CORRECTION: Cleared the defrost drain of ice and debris, operation now normal.