Before Replacing Control Panel Or Fan Control Module
WARNING: This page is about a different car, the 1996 Saab 900 and 1995 Saab 900. However, it is still accessible from the selected car via links, so may be relevant.
Before replacing the control panel or fan control unit, perform the following steps before definitely deciding that component in question is at fault:
1) Ensure that all diagnostic procedures for the relevant trouble code have been carried out. If necessary, see FAULT DIAGNOSIS .
2) Study the wiring diagram of the circuit in question and make sure you understand how it works. See WIRING DIAGRAM . If necessary, see DESCRIPTION and OPERATION.
3) Check ALL ground points. If this has already been done, do it again. Check A/C-heater control panel (control module) power supply. If fault persists, replace control module.