I can manually turn my a/c on with the remote and then tell it to turn off after 1,2,3,4 hours.
I have bought a WiFi controller, which I can program on my phone for it to go a/c on, down to fan at predetermined times. For me ON at 19.30 to 21.00, then fan until morning. If it gets too hot, I can manually turn it on for an hour or so with the remote. Best I can think of.