Upon arrival the homeowner had a complaint of AC not keeping up and ice on valves and line set. I checked the filter - clean but a restrictive filter. I could hear the refrigerant swooshing. The system is approximately 5 pounds low on 410a. I gave the homeowner the follow options: Top off and timeline. Sealant and top off. Leak search and make repairs. Replace AC. Being the homeowner is new to the house and doesn"t have a history with unit, he wants to go with replacement.