What is it when the A/C blows cold air on driv. side, hot on passenger side

Your hot cold blend servo (actuator) is possibly bad. I believe the passenger servo is located on top of dash behind radio. The driver blend servo is at bottom of dash on passenger side of transmission hump. Try disconnecting battery negative cable and leave off for about 20 minutes. This will make system reboot if there's a communication failure. Worked for me a couple of times.

blend door actuator have them tested to determine which one is bad. poss pass side