
You can use a towel dipped in laundry detergent or stain remover. The functions of a car air conditioning filter include the following 3 points: 1. Provide fresh air: It prevents the car windows from fogging up with water vapor, ensuring clear visibility for the driver and safe driving. It supplies fresh air to the cabin, preventing passengers from inhaling harmful gases and ensuring driving safety. It also effectively sterilizes and deodorizes. 2. Ensure safety and hygiene: It keeps the cabin air clean and prevents bacterial growth, creating a healthy environment. It effectively separates solid impurities such as dust, core powder, and grinding particles from the air. It also effectively intercepts pollen, ensuring that passengers do not experience allergic reactions that could affect driving safety. 3. Adsorb harmful substances: It adsorbs moisture, ozone, odors, and carbon oxides from the air, providing strong and durable moisture adsorption.

When water from my car's air conditioner drips onto the car body, the first thing I check is whether the drain hole is clogged. This is located under the car or at the rear of the engine compartment, and can be cleared using a wire or small needle. If water flows out, then it's fine; if it still drips, I rinse the hole with a hose. The key is not to let it accumulate, as prolonged dripping on the car paint can cause rust. A friend of mine once had a small rust spot on his car because of this and spent several hundred dollars to repaint it. When parking, try to avoid parking directly under the air conditioner outlet, and pay extra attention to cleaning before and after the rainy season. Actually, air conditioner water dripping is normal as it drains condensation, but if it's excessive, check if the evaporator is clogged with dirt. I service it once at the beginning of summer and early autumn each year, clearing the drain hole at the same time—it saves hassle and prevents odors inside the car. Nowadays, tools are easy to buy online, like an air compressor gun for just a few dozen dollars, and you can do it yourself in five minutes. Remember, safety first—don’t start the car when working, and wear gloves to protect against dirty water.

When dealing with air conditioning water dripping onto the car, I prefer to approach it from a systemic perspective. During operation, the evaporator condenses moisture, which is discharged outside the vehicle through drainage holes. If these holes get clogged, water can flow back onto the car or inside, causing wet carpets or even corroding components. I usually use a blower gun or a thin tube to clear the holes, and that solves the problem. Neglecting this issue long-term may lead to rusting of the metal panels or short-circuiting of wires, which would be costly to repair. Additionally, parking location matters—avoid low-lying areas or spots under external AC units. I think this aspect of maintenance is often overlooked. Checking the drainage vents every six months, along with cleaning the undercarriage, can prevent issues. If there's excessive water, it's also good to check if the AC filter is dirty—replacing it reduces clogging risks. This way, the car lasts longer, and driving remains pleasant. Simply put, prevention is much better than repair, saving both time and money.

I experienced this as a novice driver. Don't panic if the air conditioner drips water onto the car—it's usually normal. However, if it keeps dripping, the drain hole might be clogged. The hole is located under the car's chassis; bend down to find it and use a clothes needle or wire to poke through and let the water flow. If you can handle it yourself, skip the repair shop to save money. Remember to regularly wax your car to prevent rust, and just wipe off any drips afterward. Maintenance isn't complicated.


