Maintenance
Cabin filter replacement: musty smell and foggy windows
“Cabin filter replacement” and “car smells mouldy when AC on” are everyday searches. The cabin (pollen) filter traps dust, leaves, and moisture; when packed, the blower struggles and windows fog.
Signs you need a new filter
- Weak airflow even on high blower
- Musty or damp smell for the first minutes of AC
- Windows fogging faster than usual
- Allergy symptoms that worsen in the car
How often
Many makers suggest every 15,000–30,000 km or yearly. Dusty roads and tree pollen seasons justify earlier swaps.
Add cabin filter to an oil-change booking on CarFix—many garages can do both in one short bay.
FAQ
Does AC gas just run out?
Not in a sealed system. Low level usually means a leak that should be found first.
Will a cabin filter fix mouldy smell?
Often for the first minutes of airflow. Persistent odour may need evaporator cleaning.