Customers now maintenance agreement customer no diagnostic fee Technician inspected upstairs system, and during time of visit the upstairs system is operating and maintaining the set temperature. There may have possibly been an electrical storm or possibly thermostat issue. However, at this time the system is operating normally with a good refrigerant level. Customer would like to start maintenance contract with us and we will schedule for system cooling maintenance in the near future. Upstairs filter is 16 x 25 x 1 Mid-level filter is 16 x 25 x 1 The basement system filter is a 16 x 20 x 1 And his upstairs office above garage uses a 14 x 20 x 1 filter