Posted on 4/25/2025
You turn on the AC expecting cool relief, but instead, a white mist starts blowing from the vents. It might catch you off guard, especially if you’ve never seen it before. While it’s usually not smoke or anything hazardous, fog coming from the vents isn’t something to brush off. In many cases, it’s a harmless result of temperature and humidity changes—but sometimes, it can point to an issue with your air conditioning system that’s worth looking into. So, when is it normal, and when should you be concerned? Why Does Fog Come Out of the Vents The white mist you’re seeing is typically condensation—water vapor turning into tiny droplets as it exits your car’s air vents. It happens when cold air from the AC mixes with warm, humid air inside the cabin. Think of it like what happens when you breathe out on a cold day and see your breath. While this phenomenon is fairly normal in humid environments, it usually only happ ... read more