Why Can't the Defogger Remove Fog?

[DelNatalie]

If the car defogger fails to remove fog, it may be because the front window defogging function was not turned off, causing cold air to continuously blow against the glass. Over time, the glass temperature becomes lower than the ambient temperature, leading to condensation of moisture on the glass surface. If the front window still fogs up on the outer surface after turning off the defogging function, it indicates an issue with the car's air conditioning airflow control damper, which cannot accurately regulate the airflow direction. Below is relevant information about defoggers: Components: A defogger mainly consists of wave-shaped blades, plates, clips, and other fixing devices. The defogger nozzle is one of the main components of the defogging system, primarily made of high-quality plastic for excellent wear resistance and long service life. Key Function: The defogger's role is to capture mist particles and slurry droplets carried by the flue gas during the spray absorption process. The efficiency of the defogger depends not only on its structure but also on the density and particle size of the mist. The atomized particle size of the nozzle is related to the viscosity of the absorption liquid, spray pressure, and nozzle structure.