Dont remember if it was an option then but does it have dual zone temp controls.?


my money is on its either a freon level issue or a blend air door problem in the box

if you have added small amounts of freon to test this, has said amounts been evacuated back out ?
If not, evac it completely and recharge the correct amount . Then start from scratch. Ck where your pressures are .
Disconnect cooling fan ( or place a piece of cardboard over the condenser and see if high side pressures rise( DO NOT let it max out)