1. Clean the AC vents. Dust and dirt can accumulate in the AC vents, causing a musty smell. To clean the vents, use a vacuum cleaner with a brush attachment to remove any loose debris. You can also use a cotton swab dipped in rubbing alcohol to clean the vents.
2. Replace the cabin air filter. The cabin air filter helps to remove dust, pollen, and other allergens from the air that enters your car. If the cabin air filter is dirty, it can cause a musty smell. To replace the cabin air filter, consult your car's owner's manual for instructions.
3. Clean the evaporator coil. The evaporator coil is located in the AC unit and is responsible for cooling the air. If the evaporator coil is dirty, it can cause a musty smell. To clean the evaporator coil, you will need to remove the AC unit from your car. Once the AC unit is removed, you can use a brush and a vacuum cleaner to remove any loose debris from the evaporator coil. You can also use a coil cleaner to clean the evaporator coil.
4. Disinfect the AC system. Bacteria and mold can grow in the AC system, causing a musty smell. To disinfect the AC system, you can use a disinfectant spray or a fogging machine.
If you have tried all of these methods and you are still experiencing a smell coming from the AC in your car, you may need to take it to a mechanic to have the AC system diagnosed and repaired.
