service call completed, client stated thermostat not operating properly, client also stated that her eyesight is very weak and can't see well on what the thermostat mode or temperature is, conducted to check and inspect system operations, drain line moderated clogg on arrival and airfilter extremely impacted, recommended to schedule a filter remand a system tune up, explained client thermostat functions and how to change operations mode and temperature, all systems vital are good at this time