Heater and A/C - Will Not Switch To Panel Mode

NUMBER: 24-12-99

GROUP: Heating & A/C

DATE: July 2, 1999

SUBJECT:
The Heating and A/C System will not switch to the instrument panel outlet mode.

OVERVIEW:
This bulletin involves installing a panel/demist door vacuum actuator.

MODELS:

1999 (TJ) Wrangler
1999 (XJ) Cherokee

SYMPTOM/CONDITION:

The heating and NC system may not switch to the panel mode. This could be caused by a leaking diaphragm in the panel/demist door vacuum actuator. This symptom could be intermittent and system could switch back and forth from the panel mode while driving.

DIAGNOSIS:

Apply vacuum to the panel/demist door actuator using a hand actuated vacuum pump containing a vacuum gauge. The actuator should hold vacuum indefinitely. If the vacuum bleeds off, the diaphragm is leaking. Perform the Repair Procedure.

PARTS REQUIRED:

1 04864995 Panel/demist Door Vacuum Actuator

REPAIR PROCEDURE:

THIS REPAIR IS COMPATIBLE WITH DAIMLERCHRYSLER'S MOBILE SERVICE PROGRAM AND DOES NOT REQUIRE HOISTS OR OTHER FULL SERVICE FACILITY SPECIAL EQUIPMENT.

1. Disconnect and isolate the negative battery cable.

2. Remove the knee blocker from the instrument panel.





3. Unplug the vacuum line from the actuator (See Figure 1).





4. Insert a trim stick or other suitable wide flat-bladed tool into the actuator mount latch hole to release the latch and gently pry the actuator outwards to remove it from the mount (See Figure 2).

5. Rotate and tilt the actuator to as required to disengage the actuator link from the door lever. Remove the actuator.

6. Install the new actuator, p/n 04864995, by installing the link onto the door lever.

7. Install the actuator onto the mount.

8. Connect the vacuum line.

9. Install the knee blocker.

10. Connect the negative battery cable.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 24-65-08-90 0.2 Hrs.

FAILURE CODE: P8 - New Part