Ford Mustang 2005 V6 coupe AC only functions for defrost on Ford Mustang

Some Ford Mustang 2005 V6 coupe owners report experiencing issues with their AC system only functioning for defrost, which may indicate a problem with the mode door or actuators in the HVAC system. This default behavior often occurs when the system detects an issue, causing it to blow air through the defrost vents. Potential causes include a broken guide door that controls airflow or a malfunctioning mode door actuator or HVAC control module that fails to direct airflow properly. Owners are advised to troubleshoot by checking for air leaks with a vacuum pump and inspecting the vacuum tree, solenoids, and selector switch for faults. Additionally, some may find that the mode actuators under the dash are stripped or damaged, leading to the system's default to defrost mode. Replacing any broken components, such as the mode door, actuators, or HVAC control module, may be necessary to restore the AC's proper functionality.