Finding brown foam bits around your car’s AC ducts is not uncommon. Over my almost 60 years in the auto repair industry as an ASE and GM master technician, I have seen my share of these phenomena, ...

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 ...