1998 pontiac gran am code help

Here's the full list:
b1236 - Window Feedback Loss of Signal
b1257 - Air Temperature External Sensor Circuit Short to Ground
b1265 - Servo Motor Coolair Bypass Circuit Failure
b1262 - Servo Motor Defrost Circuit Failure
b1286 - Servo Motor Potentiometer Airintake Left Circuit Short to Battery

With the exception of the first window code, sounds like something with the climate control system. Wish I could help more, but that's out of my league. Good luck!