Preliminary Information
WARNING: This page is about a different car, the 1996 Buick Roadmaster. However, it is still accessible from the selected car via links, so may be relevant.
Enter diagnostic mode by pressing OFF and TEMP up buttons at the same time. Using fan up or fan down button, select pointer number "-15". Press MIDDLE button to display current learn value. Press TEMP down and VENT buttons at the same time to enter LEARN MODE, (°F/°C will illuminate). Press TEMP up or TEMP down to change temperature calibration test offset. The learn value can be changed plus or minus 5°F (3°C). To lock new learn value into A/C-heater control panel, press and hold VENT and front defrost buttons for 5 seconds. Value will blink off and on, indicating a new learn value has been locked into memory.