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The cabin filter is an element of the car ventilation system, designed to clean the air that enters the car. The filter traps hazardous exhaust gas products, soot, dust, sand and other harmful substances that are present in large quantities in the air.
Over time, a lot of dirt and dust would accumulate on the evaporator, and these are very favorable conditions for the development of microorganisms. It is because of them that the cabin smells of mold or dampness. The cabin filter keeps the air conditioner evaporator intact and clean. Without it, the furnace and air conditioner would wear out and become dirty faster.

Types of cabin filters

1 Paper cabin filters.
It is also called mechanical because it sifts out dust particles like a sieve, but allows air through its pores. These filters are light-colored and are made from paper or synthetic fiber. There are two main types of mechanical filters:

  - Single layer. This is a regular paper or synthetic filter that filters out large debris, dirt and dust.
  - Multilayer. In addition to the first layer, it has at least one more electrostatic layer. It attracts the smallest particles to itself.
Simple filters protect the interior and evaporator well from dust and dirt. The disadvantages of paper filters include - there is no protection against gases and gaseous substances

2 Carbon cabin filter.
It is also called an adsorption filter. Its base is black, and the design itself is slightly heavier than a simple filter. This is because it uses activated carbon, a substance that can absorb gases. The carbon filter protects the interior from external unpleasant odors and harmful volatile substances.
Carbon filters filter out almost all nitrogen dioxide. In addition, they successfully cope with other dangerous impurities: hydrocarbons and benzopyrene. But carbon filters do little to stop carbon monoxide.
The carbon filter wears out faster in large cities. The active layer of coal is covered with pores, which over time fill with harmful gases. When the filter becomes very dirty, it will begin to “return” them to the environment, and they will enter the cabin. Therefore, it is important to change the carbon filter on time.

Depending on the car model, filters are made in different sizes.

Location of the cabin filter in the car.
- The filter may be located under the glove compartment of the passenger seat.
- Under the dashboard. The cabin filter can be located under the car's dashboard, at the driver's feet, or on the side of the front passenger seat.
- Some cars have a cabin filter installed under the hood. The exact location depends on the car model, but most often the filter is located closer to the windshield or under it.
To change such filters yourself, you need to know the exact location of the part and a clear sequence of actions. Most often it is necessary to unscrew the screws and remove the protective elements.

If the cabin filter is rarely changed, this can lead to problems with the performance of the heater. In addition, the air in the cabin will be much dirtier, which can affect the well-being of the driver and passengers. Also, in a car with a dirty filter, the windows will fog up faster. Clogged layers increase resistance to air flow, and because of this, the load on the fan motor increases. This can lead to its rapid wear and failure. Airflow also deteriorates and the overall performance of the heating system decreases.
Replacing the cabin filter is provided during maintenance.

"Cabin air filter replacement" fixes "Clogged air filter"

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Four common causes for an AC not cooling the vehicle and their related parts.
This fix will help eliminating

AC Isn't Cooling

The AC isn’t blowing cold air because the cabin air filter is clogged, the blower motor is faulty, or there’s an issue with the fan’s resistor. However, less commonly, it might also be that the engine is overheating or has a faulty refrigerant flow. It can also be a malfunction in the expansion valve, electrical control, a clogged orifice tube, or related issues.

If your car's air conditioning system is not cooling, you must immediately take action. Ignoring this issue may cause your hot summer months to become tougher.

Consider having an experienced professional diagnose and discuss the problem promptly. Doing so ensures that your vehicle remains in good working order and you're safe while driving. Don't let a minor issue become a significant problem that could have been avoided with prompt attention and maintenance.

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Four common causes for a vehicle A/C working inconsistently and their related parts.
This fix will help eliminating

AC Only Work Sometimes

It’s only working sometimes because the cabin air filter is too dirty, the “mode” door motor is faulty, or the variable compressor is stuck. Alternatively, the following parts might intermittently malfunction: the ac control unit, the ac high-pressure switch, and the evaporator temperature sensor.

Are you experiencing an unpredictable AC system in your car? One moment, it's working fine, and the next, it's not cooling at all? Air conditioners that blow cold air at one time and warm air at another are probably going through electrical issues.

Don't take this issue lightly! Ignoring it could put your safety at risk and lead to costly repairs. Instead, consider discussing with a professional to address the problem immediately.

Doing so ensures your vehicle remains in good working order, and you can drive it carefree, knowing your car air conditioner functions consistently. Don't let a minor AC issue become a significant problem that could have been avoided with timely maintenance.

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Four common causes for a vehicle overheating after turning the A/C on and their related parts.
This fix will help eliminating

AC Smells Like Vinegar

The vinegar smell is probably due to moldy substances built up in the air conditioning system. This could be caused by a clogged air filter, moldy evaporator, or even something rotten inside the system. Alternatively, a food substance spilling in the vehicle or a sunroof leak could be culprits. More rarely, the smell could come from sulfated batteries releasing fumes; this is particularly noticeable when the AC is not in recirculation mode.

Ensuring your vehicle's AC is blowing fresh air is essential for comfort. Remember, a small problem ignored today can become costly and dangerous tomorrow. So act now, and stay safe on the road!

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