My car smells bad when I turn on the air conditioner. What should I do?

First of all, you need to find out why there is a smell when the air conditioner is turned on, and solve the problem fundamentally based on the cause.

Generally speaking, if there is a smell when the car air conditioner is turned on, it is mostly due to the evaporator box. After the air enters the car, it will be cooled or heated through the evaporation box, and then the cold and warm air will be blown out through the blower. During use, it is inevitable that bacteria, dust, and even insect corpses will enter the evaporation box. Over time, the air conditioner will become damaged when in use. There will be an odor.

So when this situation occurs, you should go to a professional car repair agency to clean the car's evaporation box to eliminate the odor.

Extended information:

Car air conditioner cleaning skills

1. Use air conditioner cleaning agent to clean car air conditioners:

(1) General Car air conditioners have pollen filters at the air inlets. Their function is to prevent external dust from entering when the car air conditioner is externally circulated. When cleaning the air conditioner, remove the pollen filter and inject the air conditioner foam cleaning agent through the air inlet. At the same time, close the air outlet of the air conditioner tightly to prevent the foam cleaning agent from flowing out from the air outlet.

(2) Next, start the car, turn on the air conditioner, and allow the foam cleaning agent to circulate internally in the air conditioning system. This step should last for several minutes to ensure that the foam cleaning agent circulates to all channels of the air conditioning system. For about 5 minutes, turn off the air conditioner and turn off the car. Soon the dirt will flow out of the duct system of the air conditioner located on the chassis. This cleaning method is suitable when the car air conditioner is not particularly dirty.

2. Disassemble and clean the car air conditioner:

Another method of cleaning the air conditioner is to disassemble and clean it. Disassembly and cleaning is much more troublesome than the first method. First, you have to disassemble the instrument panel. Take out the evaporator of the air conditioner. The air conditioner evaporator that has not been cleaned for a long time must be covered with dust. At this time, it needs to be carefully brushed clean with a brush. After washing, reinstall the air conditioner and use the first method to clean the air conditioner.

Reference material: People's Daily Online - What should I do if the air conditioner smells bad? Editor experiences three deodorizing methods