Customer still concerned that system is running longer than normal. Ran and checked entire system. Pressures are good 350 head and 130 suction 11 degrees superheat and 14 degrees subcooling. I went ahead and clean condenser and evaporator coil. Fired unit backup and noticed that the outdoor fan will change in Pitch. Also noticed that outdoor fan motor will change amp drawers when the pitch changes. Outdoor fan rated at 1.9 amps. As fan changes pitch amp draw goes from 1.7 to 1.2. Also head pressure will rise as this is occurring. Voltage into system does not change. Ordered new fan motor and blade