Hope this helps you. Might be a good idea to check under the hood for a vaccum line that has come disconnected. Loss of vaccum will cause this condition. Home | Account | Contact ALLDATA | Log Out | Help STANLEY CHEVROLET Select Vehicle | New TSBs | Technician's Reference Component Search: Conversion Calculator 2000 Jeep Truck Cherokee 4WD L6-4.0L VIN S Vehicle Level Heating and Air Conditioning Air Door Air Door Actuator / Motor Service and Repair Mode Door Actuator Replacement Mode Door Actuator Replacement Notes WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS AND SEAT BELTS/AIRBAGS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY. DEFROST DOOR ACTUATOR Disconnect and isolate the battery negative cable. Remove the instrument panel assembly from the vehicle. Refer to Instrument Panel Assembly in Instrument Panel Systems for the procedures. Defrost, Floor And Panel/Demist Door Vacuum Actuators Unplug the two vacuum harness connectors from the defrost door actuator. Vacuum Actuator Remove/Install - Typical Insert a trim stick or another suitable wide flat-bladed tool into the latch hole on the heater-A/C housing actuator mount. Gently pry the actuator latch while pulling firmly outwards on the actuator to remove the actuator from the mount. Rotate and tilt the vacuum actuator as required to disengage the hole on the end of the actuator link from the hooked pin on the end of the defrost door lever. Remove the defrost door vacuum actuator from the vehicle. Reverse the removal procedures to install. FLOOR DOOR ACTUATOR Disconnect and isolate the battery negative cable. Remove the instrument panel assembly from the vehicle. Refer to Instrument Panel Assembly in Instrument Panel Systems for the procedures. Unplug the vacuum harness connector from the floor door actuator. Insert a trim stick or another suitable wide flat-bladed tool into the latch hole on the heater-A/C housing actuator mount. Gently pry the actuator latch while pulling firmly outwards on the actuator to remove the actuator from the mount. Rotate and tilt the vacuum actuator as required to disengage the hole on the end of the actuator link from the hooked pin on the end of the floor door lever. Remove the floor door vacuum actuator from the vehicle. Reverse the removal procedures to install. PANEL/DEMIST DOOR ACTUATORS Remove the defrost door actuator from the heater-A/C housing. See Defrost Door Actuator for the procedures. Unplug the vacuum harness connector from the panel/demist door actuator. Insert a trim stick or another suitable wide flat-bladed tool into the latch hole on the heater-A/C housing actuator mount. Gently pry the actuator latch while pulling firmly outwards on the actuator to remove the actuator from the mount. Rotate and tilt the vacuum actuator as A required to disengage the hole on the end of the actuator link from the hooked pin on the end of the panel/demist door lever. Remove the panel/demist door vacuum actuator from the vehicle. Reverse the removal procedures to install. RECIRCULATION AIR DOOR ACTUATOR A recirculation air door and vacuum actuator are used only on models with the optional air conditioning system. Disconnect and isolate the battery negative cable. Remove the kick cover from the heater-A/C housing. See Kick Cover for the procedures. Recirculation Air Door Vacuum Actuator Remove/Install Unplug the vacuum harness connector from the recirculation air door actuator. Insert a trim stick or another suitable wide flat-bladed tool into the latch hole on the heater-A/C housing actuator mount. Gently pry the actuator latch while pulling firmly outwards on the actuator to remove the actuator from the mount. Rotate and tilt the vacuum actuator as required to disengage the hole on the end of the actuator link from the hooked pin on the end of the recirculation air door lever. Remove the recirculation air door vacuum actuator from the vehicle. Reverse the removal procedures to install. © 2006 ALLDATA LLC. All rights reserved. Terms of Use