Can you clean the car's air conditioning yourself? What the professional does better
Clean air – through a clean system
A functioning air conditioning system is more than just comfort: it ensures clean, dry air, dehumidification of the vehicle interior, clear visibility, and protects the health of the passengers. However, over time, moisture, dust, and organic residues accumulate in the system due to the humidity in the cooling system. These surfaces create ideal conditions for bacteria, mold, and germs.
The result: unpleasant odors, irritated airways, and reduced cooling performance.
To avoid this, regular maintenance with professional cleaning of the air conditioning system is essential – for cars, trucks, agricultural machinery, or building air conditioning systems.
Why self-cleaning of the air conditioner is not sufficient
Commercially available "click cans" or fragrance sprays for self-cleaning may seem convenient at first glance, but according to experts – such as the VDI and ADAC - they are only superficial, without any cleaning effect.
They do not reach the evaporator, nor do they mechanically remove the biofilm where microorganisms settle.
This means: The smell is temporarily masked – the cause remains.
Even the ADAC advises against such do-it-yourself methods.
They do not replace professional cleaning, where components such as evaporators, filter housings, and air ducts are specifically cleaned and disinfected
The typical problem areas: filter and evaporator
1. Cabin air filterThe filter cleans the air that enters the vehicle's interior. It captures fine dust, pollen, and bacteria.
However, over time it becomes clogged, which not only reduces air quality but also decreases airflow and promotes the formation of mold.
The VDI/ZDK recommends: change at least once a year, and for sensitive individuals (e.g., allergy sufferers) even every six months.
In the evaporator, the air cools down – this is where moisture forms.
When dirt particles settle, they create a breeding ground for germs.
According to studies by the VDI (Association of German Engineers) and the ZDK (Central Association of the German Motor Trade), the air from the air conditioning system in about one in three vehicles is considered to be a health concern. They also recommend an annual cleaning of the air conditioning system.
What specialist companies do differently
A professional air conditioning cleaning goes far beyond a simple cleaning or disinfection:
- Inspection and upgrade of the cabin air filter
- Access to the evaporator and cleaning according to the manufacturer's instructions – if available
- Cleaning of the filter environment
- Functional test of the entire system
- Installation of a new air filter
This not only eliminates odors but also permanently improves air quality and extends the lifespan of the air conditioning system.
Guidelines and Recommendations
The VDI/ZDK guideline 6032 recommends:
- Annual cleaning of evaporator and filter area
- Annual interior and air filter replacement
Regular, professional cleaning ensures a hygienic vehicle climate and prevents health hazards.
Find cleaning service partners
Anyone looking to have a thorough air conditioning cleaning performed in accordance with the VDI/ZDK 6032 guidelines will find a network of certified professionals at
aircowell.com for:
Cars and vans
Trucks and commercial vehicles
Agricultural machinery
These partners operate according to the specifications of VDI/ZDK 6032 and use model-specific airco well® cleaning processes that are directly tailored to the respective vehicle construction.
For workshops: Efficient introduction to climate service
Workshops can also easily offer this service.
In the airco well® app, all model-specific instructions, application videos, and product information are available.
This allows for professional, quick, and documented air conditioning cleaning.
Conclusion – Air quality is a matter for professionals
A clean air conditioning system means clean air.
Do-it-yourself cleanings only fight the symptoms, not the cause.
Regular maintenance by a professional service according to VDI/ZDK 6032 is the only method to permanently eliminate germs and mold – and at the same time protect technology, health, and comfort.