My ac is blowing out hot air

Verify you are getting clutch engagement. If not either it is not getting power or the clutch gap is not within specification. Hopefully you have a gauge set. If the clutch is working then have a look at the operating pressures. They will vary with ambient temperatures. If not within specification or unusually high or low then there may be a restriction in the system such as the expansion valve or condenser. It's always good practice to at least pump the system down and put a new receiver drier in. I am assuming that the interior flaps all work well given the age of the vehicle. Some vehicles have a self diagnostic mode for the climate control to do flap tests.