Jeep Grand Cherokee
On the 2009 Jeep Grand Cherokee, when the A/C is working correctly on one side but not the other, this means the system is working correctly, but the air is not being switched correctly. This is most commonly due to a faulty Blend Door Actuator Motor. This motor is what “turns the door” inside the HVAC housing according to the selection on the control panel. You can find the actuator located behind the glove box, mounted to the HVAC housing. Carefully inspect the electrical connector for any loose, broken or damaged wires. Remove the actuator and inspect the HVAC housing for any broken parts at the actuator mount spot. If the visual inspection checks ok, suspect a faulty Blend Door Actuator and replacement should solve the problem.
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