It depends on how your AC is set up. If there isn’t any controls on the ceiling panel, then the thermostat controls it. Depending on which thermostat you have will determine how to “request” A/C.
If you can post a pic of the thermostat it would help.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.