A/C-Heater Control Unit: Notes
WARNING: This page is about a different car, the 1995 Oldsmobile Cutlass Supreme. However, it is still accessible from the selected car via links, so may be relevant.
The A/C-heater control unit, mounted in the instrument panel, contains A/C-heater mode control, blower control, and temperature setting switches. See Figure. When certain system malfunctions occur, the A/C-heater control will store trouble codes. The °C or °F indicator will flash when a code is stored.