air conditioner not cooling enough

[ira]

someone please help im having probrem whit air conditioner. its browing air ok but its not cold enough. i tried evry setting on the panel,set temp lowest, pressed recirc botton, air blow max, no luck. i took it to repair shop(couse my dealer is kinda far),they said complesser is working, gas is full, pipes are cold. could be temp sensor or flap linkage not workng properly so warm air get mix with cold air. or climate control panel it self. does anyone have any idea? anyone experienced something like this? where is the temp sensor? where is the flap linkage that separating hot and cold air?
thank you.