Completed cooling tuneup. Replaced 16 x 25 x 1 filter, cleared drain lines, cleaned outdoor unit, checked electrical components and checked charge. Outdoor unit was extremely dirty. Indoor filter was also dirty. After cooling tuneup system is cooling at manufacture specifications. Diagnosed issue with upstairs thermostat and zone. Damper motor. Estimate for repairs have been created And sent to customer. Upstairs thermostat and zone. Damper motor have been disabled at the zone board. Customer replaces upstairs thermostat. They will also have to replace upstairs zone damper motor at the same time for correct comfort control.