How to Solve the Problem of a Foul Smell Inside the Car?

[ArthurAnn]

When the air conditioning is turned on, there is a strong moldy smell coming from the vents. The reasons and solutions are as follows: 1. Long-term lack of cleaning: If the air conditioning filter has not been cleaned or replaced for a long time, dust accumulates too much and ferments with the internal water vapor of the air conditioning system, resulting in a moldy smell. Regularly clean and replace the filter. 2. Dust mixed with condensed water: Dust entering the evaporator and mixing with condensed water can also produce a moldy smell over time, eventually turning into a sour smell. In this case, the evaporator needs to be cleaned. It is best to have it cleaned by 4S staff to avoid damaging the components. 3. Ventilation ducts: Due to the large temperature difference after the air conditioning is turned off, water vapor in the ventilation ducts condenses into water droplets. Over time, mold can grow in the ducts, causing odors. The ducts can be cleaned periodically when replacing the filter.