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Hi Sharon, I'm glad to help. Your 2000 year doesn't have a motor for the temp door. It operated by a cable running from the control head to the temp door and you work it manually. If you can't control the temperature from hot to cold, sometimes the cable come off or breaks. Here how you can see the cable to see if its working. Remove the radio and right behind it you will see the cable attached to the door, while watching it move the temp lever from hot to cold and watch it. If it is moving then its most likely out of ajustment. If it is not moving, then you'll need a new cable. Just in case it is moving, I'm attaching the instruction on how to adjust it below. Hope this helps and have an awesome day Sharon!
TEMPERATURE CONTROL CABLE
Any time the heater-A/C control or the temperature control cable are removed and/or replaced, the following procedure must be performed.
The temperature control cable housing and core must be installed at both the heater-A/C control and the heater-A/C housing ends, and the heater-A/C control must be installed in the instrument panel. See Heater-A/C Control and Temperature Control Cable in the Removal and Installation section of this group for the procedures.
Rotate the temperature control knob on the heater-A/C control so that the knob pointer is in the 12 o'clock position.
Pull the temperature control knob straight out from the heater-A/C control base until the perimeter of the knob (not the knob pointer) protrudes about 6 millimeters (0.25 inch) from the face of the control base.
Rotate the temperature control knob to the 1 o'clock position. Push in on the knob slightly and continue rotating the knob to its full clockwise stop. The knob pointer should be aimed at a position about 8 millimeters (0.315 inch) beyond the end of the graduated red strobe temperature control graphic on the face of the heater-A/C control base. If the knob is not pointed to the correct position, go back to Step 2 and repeat the adjustment procedure.
Rotate the temperature control knob counterclockwise until the knob pointer is in the 12 o'clock position again.
Push the temperature control knob straight in towards the heater-A/C control base until the perimeter of the knob (not the knob pointer) is flush with the face of the heater-A/C control base.
Rotate the knob to its full clockwise stop again. The knob pointer should be aimed at the end of the graduated red strobe temperature control graphic on the face of the heater-A/C control base. If OK, go to Step 8. If not OK, go back to Step 2.
Rotate the knob to its full counterclockwise stop and release the knob. If the knob springs back from the counterclockwise stop, the self-adjuster clip that secures the temperature control cable to the blend-air door lever is improperly installed. See Temperature Control Cable in the Removal and Installation section of this group for the procedures. If the knob does not spring back, the temperature control cable adjustment is complete.
it depends on what model and what options your Journey is equipped with. if it has a dual zone control climate control, it sounds like the blending actuators are not aligning properly or the blend doors are not adjusting to cooperate with the main climate control system. the temp. of the vehicle is controlled by Blend doors in the h/vac system that is thereby controlled by the body control module of the vehicle. the module is a computer that controls all functions within the body of the vehicle. the module should have problem codes that should isolate the area that needs attention.
the body module controls the blend doors in the h/vac system, the doors that open and close in the vents by the heater core that controls the temperature that is ultimately expelled the correct temperature that comes out of the vents. if the settings on both the drivers and passengers control knobs for example are on cold, and one side is hot and one side is cold, then there is a problem at the module level or most likely the blend door is the problem. most likely the actuator ( the motor that runs the blend door and controlled by the module) is not operating properly. your dealer will hook the module up to a diagnostic computer and retrieve the codes ( if any) and isolate which blend door is not working correctly.
usually its just a blend door actuator that needs replacing. to rule out heater core issues, if there is no excessive condensation on the windows and coolant on the carpet, then most like it's a module or blend door issue. if it's a single mode climate control, the same is true but puzzling b/c in that case, both passenger and driver h/vac system is designed to push out a consistent temp for both side without the option of variation on either side. again most likely a blend door issue.
The source of the problem is not the knob it is the temp blend door binding. Putting to much stress on the knob. If you replace just the control head with the knob it will only break again. You need a dampener repair kit and to install you will have to remove the dash and heater core.this will slow you to access the door that is binding. Hope this was more help then it broke replace it.
OK IF BOTH HEATER HOSES ARE HOT IT HAS TO BE A BLEND DOOR MOTOR PROBLEM YOU NEED TO FIND THE BLEND DOOR MOTOR UNDER DASH MOVE TEMP KNOB BACK AND FORTH. SEE IF BLEND DOOR IS MOVING IF NOT MAKE SURE YOU HAVE VOLTAGE. IF SO REPLACE BLEND DOOR
sound like a vacuum leak. you can check this by spraying wd40 very carefilly on the vacuum lines under the hood. the idle will change when a leak is detected. could also be a modulator valve or vacuum line under the dash. check this with a spray bottle filled with water. dont want the smell of wd40 in the cabin
The temp blend door, or blend door actuator may be faulty. You can check this by watching the movement of the blend door actuator while you turn the temp selector knob. If the actuator is working, then it may be the blend door, or blend door lever broken. If these are ok then the control head may be faulty.
The location of the blend motor on my 2005 malibu is on the driver side, near the center consol, not easy to get to. Before you try to remove the blend motor, unplug the wires it, turn the temp knob to cool side, disconnect the pos side of the battery for a couple of minutes. Reconnect the battery, plug in the bend motor start the car and turn the temp control to heat side. If this does not work remove the motor and repeat. the motor my be jamed. I had the same problem, this might be a cheaper way to fix this instead of the dealer. PS if you remove the blend motor, be carfull to look at the orientation of the spring on the shaft of the door in case it pops off.