Car AC smells are usually caused by mould, mildew, or bacteria buildup on the evaporator core due to trapped moisture, or a dirty/clogged cabin air filter. A musty, “dirty feet,” or vinegar smell ...

A musty smell from car air conditioning is caused by mold, mildew, or bacteria growing on the evaporator core inside the dashboard. The evaporator collects moisture as a byproduct of the cooling ...