The AC only makes things cooler.
Simply ask: Is the temperature all right? Would you like it any warmer or cooler?
You have been given several more natural alternatives. Why are you still trying to come up with less natural ones?
I am just trying to shorten it, as a taxi driver I am repeating the same sentence everyday, short and sweet is better. If it cannot/can be shorten, you can say so, why not let me improve my English by answering my question on #22? You can also correct any mistakes.