QuestionHello Kevin.
Our Jeep has a wierd thing happening. The AC and Heater controls are all out of wack. I turn on the AC and the driver side blows cool air and the passenger blows hot. I can't get vent air and the dual comfort control doesn't seem to function on auto or in manual modes. The fan blows but different temps at the same time. Have you ever heard of this? Does it need a dealer to look at it or could it be a sensor or switch I can replace on my own?
Answermore then likely the blend air doors are broken do this test and see what codes u get.
ENTERING THE AZC SELF-DIAGNOSTIC MODE
To enter the AZC self-diagnostic mode, perform the following:
Depress the A/C and Recirc buttons at the same time and hold. Rotate the left temperature control knob clockwise (CW) one detent.
If you continue to hold 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 heater-A/C control must be replaced.
After viewing the Segment Test, release the A/C and Recirc buttons and the display will clear momentarily. If the display remains blank then no faults are set in the system. Should there be any faults, either "current" or "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 turned "OFF".
FAULT CODE TESTS
Fault codes are two-digit numbers that identify a circuit that is malfunctioning. There are two different kinds of fault codes.
Current Fault Codes - Current means the fault is present right now. There are two types of current faults: input faults, and system faults. If the system has a current fault when the ignition is turned "ON", or during normal operation a current fault occurs, the right side set temperature digits will display "ER" at maximum intensity, while the left side set temperature digits are blanked.
Historical Fault Codes - Historical or stored means that the fault occurred previously, but is not present right now. A majority of historical fault codes are caused by intermittent wire harness or wire harness connector problems.
CURRENT FAULT CODES
Input faults 01 = IR thermister circuit open
02 = IR thermister circuit shorted
03 = Fan pot shorted
04 = Fan pot open
05 = Mode pot shorted
06 = Mode pot open
07 = IR sensor delta too large
08 = Reserved
09 = Reserved
10 = Reserved
11 = Reserved
12 = Reserved
System Faults 13 = AI (Recirc) motor not responding
14 = Mode motor not responding
15 = Left temperature door not responding
16 = Right temperature door not responding
17 = AI (Recirc) door travel too small
18 = AI (Recirc) door travel too large
19 = Mode door travel range too small
20 = Mode door travel range too large
21 = Left temperature door travel too small
22 = Left temperature door travel too large
23 = Right temperature door travel too small
24 = Right temperature door travel too large
25 = Calibration check sum error
26 = Engine coolant temp bus message missing
27 = Vehicle speed bus message missing
28 = Engine RPM bus message missing
29 = OAT bus message missing
30 = Display intensity bus message missing
31 = VIN number bus message missing
32 = Reserved
HISTORICAL FAULT CODES
Input faults 33 = IR thermister circuit was open
34 = IR thermister circuit was shorted
35 = Fan pot was shorted
36 = Fan pot was open
37 = Mode pot was shorted
38 = Mode pot was open
39 = IR sensor delta was too large
40 = Reserved
41 = Reserved
42 = Reserved
43 = Reserved
44 = Reserved
System Faults 45 = AI (Recirc) motor was not responding
46 = Mode motor was not responding
47 = Left temperature door was not responding
48 = Right temperature door was not responding
49 = AI (Recirc) door travel was too small
50 = AI (Recirc) door travel too large
51 = Mode door travel range too small
52 = Mode door travel range too large
53 = Left temperature door travel too small
54 = Left temperature door travel too large
55 = Right temperature door travel too small
56 = Right temperature door travel too large
57 = Calibration check sum error
58 = Engine coolant temp bus message missing
59 = Vehicle speed bus message missing
60 = Engine RPM bus message missing
61 = OAT bus message missing
62 = Display intensity bus message missing
63 = VIN number bus message missing
64 = Reserved
65 = Reserved
66 = Reserved
67 = Reserved
