Vents not blowing out where it should

KRSC35E3

MEMBER
2010 JEEP LIBERTY
95,000 MILES

When the A/C and heat are on and in the position for feet it only blows out at the defrost vents. The A/C and heat work great, but doesn't blow out where it’s suppose to. What could cause this? I just had the blend door accurater replaced not that long ago.

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,117 POSTS

Hi and thanks for using 2CarPros.

The blend air door actuator is responsible for temperature and not air flow directions. A component called a mode door actuator changes air flow directions.

Here are the directions for removal and replacement of the actuator. The attached pictures correlate with these directions.

MODE DOOR ACTUATOR - REMOVAL
REMOVAL

WARNING: Disable the airbag system before attempting any steering wheel, steering column or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable and wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow these instructions may result in accidental airbag deployment and possible serious or fatal injury.

NOTE: LHD model shown. RHD model similar.

1. Disconnect and isolate the negative battery cable.
2. If equipped, remove the silencer from below the driver side of the instrument panel.
3. Disconnect the wire harness connector (3) from the mode door actuator (2) located on the driver side of the air distribution housing (5).
4. Remove the two screws (1) that secure the mode door actuator to the actuator mounting bracket (4) and remove the actuator.

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Install

MODE DOOR ACTUATOR - INSTALLATION
INSTALLATION

NOTE: LHD model shown. RHD model similar.

1. Position the mode door actuator (2) to the actuator mounting bracket (4) located on the driver side of the air distribution housing (5). Make sure the actuator output shaft is properly aligned to the door linkage. If necessary, rotate the actuator slightly to align the splines on the output shaft with those in the mode door linkage
2. Install the two screws (1) that secure the mode door actuator to the actuator mounting bracket. Tighten the screws to 1.2 Nm (10 in lbs.).
3. Connect the wire harness connector (3) to the mode door actuator.
4. If equipped, install the silencer below the driver side of the instrument panel.
5. Reconnect the negative battery cable.
6. Initiate the Actuator Calibration function using a scan tool
See: Heating and Air Conditioning > Component Tests and General Diagnostics > HVAC System Test

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Let me know if this helps or if you have other questions.

Take care,
Joe

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