What Causes Reduced Airflow When Car AC Runs for a Long Time?
1 Answers
Reasons for reduced car AC airflow: Blocked dashboard vents; Air leakage in dashboard vent ducts; Abnormal air direction control mechanism; Faulty air direction control motor; Low blower fan speed; Malfunctioning blower speed control module; Frozen AC pipelines; Clogged cabin air filter. Causes of unpleasant odors in car AC systems are as follows: 1. Accumulated dust in interior filters and copper coils: After prolonged use, dust accumulates in the interior filters and copper coils, reaching a certain level that generates odors. When the AC is turned on, these odors disperse into the air. 2. Moisture inside the interior unit: Following cooling/heating operations, moisture often remains inside the interior unit. If the AC lacks a dry anti-mold function and shuts down immediately, this persistent moisture leads to mold growth over time, naturally producing musty odors.