Toronado Models
WARNING: This page is about a different car, the 1986 Oldsmobile Toronado and 1986 Buick Riviera. However, it is still accessible from the selected car via links, so may be relevant.
When in the "Service Mode", the climate control will continue to operate in whatever setting it was in prior to the "Service Mode". Even though the display may change as the buttons are touched, the previous operating mode is remembered and will resume after entering the "Service Mode".