Plymouth Grand Voyager air flow stuck on defrost mode, won't change to other settings on Plymouth Grand Voyager

Some Plymouth Grand Voyager owners report experiencing issues with air flow being stuck on defrost mode, which may be attributed to a faulty Mode Door Actuator that controls air direction through the vents. Additionally, the HVAC system's reliance on components such as the mode door actuator can contribute to this problem. Some owners find that resetting the climate control system by turning on the blower and pressing specific buttons on the ventilation control panel can sometimes resolve the issue. Furthermore, it may be necessary to check and potentially replace the vacuum lines or the blend door actuator to address the persistent air flow from the defrost vents. This situation can hinder the system's ability to effectively dehumidify the air, as the defrost function automatically activates the A/C compressor to remove fog or condensation from the windshield. Owners experiencing these issues are advised to inspect these components to regain control over their air flow settings.