What are the precautions for cleaning car air conditioning?

[StRobert]

Here are the precautions for cleaning car air conditioning: 1. Inappropriate methods for cleaning the air conditioning filter element and filter cotton: It is not suitable for washing with water. Similar to the filter screens used in home air conditioners, most cars have an air intake filtration device installed at the external circulation air intake. When the external circulation of the air conditioning is activated, air is drawn from outside the car, heated or cooled, and then blown out through the interior vents. A large amount of dust accumulates in the air conditioning ducts, which are damp and warm, making them prone to bacterial growth. When passing through the evaporator, the water vapor in the air condenses into water droplets. Normally, the water flows to the bottom of the air conditioning heating device housing, washing away the attached dust, and is then discharged outside the car through a drain pipe. If the car is frequently driven in dusty areas, the impurities and dust in the air cannot be completely washed away by the water on the evaporator blades, gradually accumulating on the blades and creating a breeding ground for mold. If cleaning is neglected, a musty odor will develop when the air conditioning is turned on. In such cases, it is necessary to clean the air conditioning system's ducts, radiator, air conditioning evaporator, and air intake filtration device to eliminate pollution sources and ensure clean air inside the car. It safeguards air quality and protects health. 2. The air conditioning filter element is prone to accumulating a lot of dust: Use specialized equipment to blow away the loose dust; never wash it with water, as this can easily damage it. When cleaning the air filter element, the filter cotton should also be cleaned. During cleaning, use a blowing method to dry it; do not directly wash the filter cotton with water. Usually, car owners should also park the car in a dry place, as materials like sponge easily absorb moisture, and dampness can breed bacteria.

[Collin]

I remember making quite a few mistakes when I first started cleaning my car's air conditioning system, but I learned my lesson. Always turn off the engine and let the AC system cool down before cleaning—hot components coming into contact with spray can cause short circuits or even fires. Use dedicated AC cleaning foam and avoid random household sprays, as they contain chemicals that can corrode the ducts or leave lingering odors. Wear gloves to protect your skin from irritants. Replace the filter if it's dirty—usually every six months—to prevent mold growth and respiratory issues. Use a small brush or soft cloth to clean the vents gently, ensuring no liquid seeps into the circuit boards, which could lead to costly repairs. After cleaning, start the car and run the heater for a few minutes to ventilate and disperse any foam residue, ensuring fresh air. My wife always reminds me that health comes first, so I stick to regular cleaning, and the air inside the car has improved a lot.