You could try to find error codes yourself with the AZC system: You most probably get 03 or 04, which has to do with the Fan control. You could clear the memory by disconnecting the car battery for a minute or so and check if the fan works ok.
ENTERING THE AZC SELF-DIAGNOSTIC MODE
To enter the AZC self-diagnostic mode, perform the
(1) Depress the a/c and recirc buttons at the same
time and hold. Rotate the left temperature control
knob clockwise (CW) one detent.
(2) If you continue to keep the a/c and recirc buttons
depressed, the AZC control module will perform
a Segment Test of the Vacuum Fluorescent (VF) display.
In the Segment Test you should see all of the
display segments illuminate as long as both buttons
are held. If a display segment fails to illuminate, the
vacuum fluorescent display is faulty and the a/c
heater control must be replaced.
(3) After viewing the Segment Test, release the
A/C and Recirc buttons and the display will clear
If a 0 is displayed, then no faults
are set in the system. Should there be any faults,
either currentor historical, all fault codes will be
displayed in ascending numerical sequence (note no
effort is made to display fault codes in chronological
order). Each fault code is displayed for one second
before the next code is displayed. Once all fault codes
have been displayed, the system will then repeat the
fault code numbers. This will continue until the left
side set temperature control is moved at least one
detent position in the CW direction or the ignition is
When you are in the self diagnostic mode , you can also enter into the actuator test mode. Turn the left temp knob so that pointer number 02 is shown (that one is for the Fan), and pressing the A/C or Recirc button will put the system into the actuator test mode. By turning the RH temp knob, you should be able to control the fan speed. If this works, then you know that the Fan controller is ok and that the problem is probably somewhere in the panel/switch.