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If the air conditioning in your car smells of vinegar, this is due to increased bacterial growth. There can be various reasons for this.
Air conditioning smells of vinegar: causes
If the air conditioning in your car smells bad, the following problems may be to blame:
- The most common cause of a car’s air conditioning smelling of vinegar is a dirty evaporator. This component is essential for cooling the air and, compared to other parts, tends to be quite damp.
- This provides the ideal environment for the growth of bacteria and germs, which cause the vinegar smell. To resolve the problem, you’ll need to have your car cleaned by a qualified mechanic. The evaporator is difficult to access without specialist knowledge.
- Furthermore, a clogged filter can lead to odours. This can also be checked at a garage, for example during a service.
- Less commonly, the vinegar smell may be caused by a lack of or expired coolant. You must have the coolant in your vehicle checked regularly.
Preventing a vinegar smell in your car
To ensure that your car’s air conditioning system stays clean and does not start to smell again after cleaning, you must prevent the build-up of germs and, consequently, odours.
- Only use the car’s air conditioning when it is necessary. If it is used too frequently at low temperatures, a lot of moisture builds up in the evaporator. This, in turn, encourages the growth of bacteria.
- Switch off the air conditioning a few minutes before the end of your journey. The fresh air entering the vehicle through the vents dries out the air conditioning system. This prevents moisture from accumulating over time.
- In winter, it is important to use the heating function of the air conditioning system. This preserves the coolant, which in turn prevents unpleasant odours.
- Regular cleaning of the interior is also important. Dust and dirt increase the humidity inside the vehicle, which in turn can accumulate in the air conditioning system. A clean vehicle generally smells less.
