The cabin air filter is responsible for clearing the air that comes through your vehicle’s HVAC system. HVAC stands for Heating, Ventilation, Air Conditioning system. The cabin air filter is also commonly called as AC filter. The filter’s function is to trap dust, pollen, and various foreign particles that can pollute the air inside the car.
The cabin air filter works in the same manner as a regular engine air filter. However, it is important to understand when you must change/replace it.
Here are a few symptoms that tell you whether your cabin air filter is in a good or bad condition.
Poor Air Flow
The first symptom one can look out for is the air flow from the vehicle’s interior vents. In most of the cases, the cabin air filter gets clogged due to an overload of dust and dirt particles. Which makes it difficult for proper airflow inside the car. Check your air filter for excessive contamination. It is a clear indication one needs to change the air filter. Since it is over clogged, the filter will not be able to perform well. This also affects the cooling capacity of the AC system, which further puts a strain on the AC blower motor.
The unusual odor from the vents
The second most important way to check if your cabin air filter is failing is to check for the unusual odor. Often in the car, while traveling, you may have noticed why there is a foul smell even though you leave the car clean. There are times when the air filter is clogged with excessive dust or dirt, it produces a musty smell. This smell gets spread out, even more, when the AC is turned. Which is why the passengers in the car feel uncomfortable and complain of feeling sick.
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