Do you get a musty smell when you get into your car in summer and switch on the air conditioning? Is the cooling less effective and is your fuel consumption higher? It’s very likely that your air conditioning ducts are too dirty! Today, let’s talk about the correct frequency and methods for cleaning your car’s air conditioning ducts.

The dangers of not cleaning your car’s air conditioning system for a long time

• Mould and bacteria may cause allergies and coughing;
• Dust build-up impedes heat dissipation, increasing the load on the compressor
• It corrodes the evaporator, shortening the life of the air conditioning system.

How often should air-conditioning ducts be cleaned?

• Consider frequency of use

1. Frequent use of the air conditioning (more than 3 times a week) → Clean once a year
2. Occasional use (a few times a month) → Clean once every two years
3. Long-term storage (more than 3 months) → Must be cleaned before use

• Consider the environment

1. Humid areas: Mould grows quickly, so clean once a year
2. Dusty areas: Dust accumulates easily, so clean 1–2 times a year

• If you notice any of these signs, have it cleaned immediately!

1. A musty or sour odour when the air conditioning is first switched on
2. Reduced airflow and slower cooling
3. An itchy nose or sneezing after switching on the air conditioning

Steps for Properly Cleaning Air Conditioning Ducts

1. Replace the air conditioning filter: a dirty filter will render the cleaning ineffective!
2. Spray cleaning solution: spray into the air intake and switch to external circulation.
3. High-temperature steam sterilisation: deep clean the evaporator and air vents.
4. Ozone disinfection: eliminate any remaining bacteria.

• Clean once a year during the transition from spring to summer.
• Switch off the air conditioning in good time before parking, and switch to recirculation mode to dry out the cabin.
• Replace the air conditioning filter every 10,000 kilometres.