Refrigerator service call. No repairs made at this time. CONCERN: refrigerator ice maker does not work properly. DIAGNOSTIC AND CAUSE: inspected for water leaks none found. Check water dispenser operation found slow water flow. Customer had reverse osmosis system installed. Checked water filter condition, good no restriction. CORRECTION: recommended plumber to inspected and update system for higher water pressure. Refrigerator water dispenser and ice maker requires 30 psi minimum to operate properly.