Car air conditioner smells musty: Causes and solutions
After a period of disuse, when a car is restarted, it often emits a musty smell from the air conditioning system, leaving many car owners puzzled as they don't know the cause or how to fix it.
A musty smell emanating from a car's air conditioning system is a common problem for many car owners when starting their vehicle after a few days, or even just one night of not using it. This causes considerable discomfort for many car users.
A musty smell emanating from a car's air conditioning system is a common occurrence for many car owners when starting their vehicle. Photo: Bá Hùng
Having owned his 2023 Honda City for about six months, Mr. Le Quyet Tien, residing in Thu Duc City, Ho Chi Minh City, said that after driving over 10,000 km, he recently noticed a musty smell emanating from the air conditioning vents when starting the engine every morning. Mr. Tien is not alone; Mr. Duc Chinh, who owns a Hyundai Stargazer in Binh Thanh District, Ho Chi Minh City, purchased for ride-sharing services, is experiencing a similar problem despite regularly cleaning the interior.
In fact, this phenomenon stems from moisture buildup in the car's air conditioning system. Simply understanding the cause and keeping a few tips in mind will help you fix this problem:
Reasons why air conditioners smell musty.
A musty smell emanating from a car's air conditioning system can stem from several causes, such as a clogged air filter that hasn't been cleaned or replaced, or a car that hasn't been cleaned in a long time. However, the main cause is sudden temperature changes. Specifically, after the engine is turned off, the cold air remains in the air conditioning system, and with the car doors closed, condensation and moisture buildup can occur, leading to mold growth. When the car is restarted, the musty smell is expelled through the vents, causing discomfort to occupants.
When the user restarts the car, a musty smell is emitted through the air vents, causing discomfort to those inside the vehicle. Photo: Bá Hùng
