Completed homecare visit today in single gas system in attic. Inspected ductwork, filter, flushed drain line and tested heating operation. Checked gas pressures and adjusted to manufacture specifications. Tested electrical components, took amp draws and verified system operation from thermostat. Inspected outdoor unit electrical, refrigerant levels and checked condenser coil overall condition. Thermostat on second floor for zoned system is displaying double image. Daikin thermostat display appears to be faulty and could not get rid of double display across screen. System is fully operational at time of service. Replace Daikin One touch thermostat under warranty. Installed new thermostat, tested equipment.