Found evaporator coil upstairs completely frozen up when I arrived as well as the compressor and line set outside. Turned AC off and left fan running to allow coil to thaw out. Scheduled service call for 6-21-23 between 12-5 to give system time to thaw out. Believe system should still be under warranty. Ruud system was in good working order, customer is getting new filters for the equipment. Renewed comfort club for another year.