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BMW X3 Windows Fog Instantly
Temperature in the 50s, not raining, heater on AUTO.
- Keep the AC on all the time the heater is on. This apparently fails when the ambient temp is below freezing. In that circumstance turning on the defogger will fog the windows instantly?
- Never recirculate the air when the heater is on. Why not disable recirculate when the heater is on to prevent fogging?
Beyond that, who knows what is going on. The car was dry on the inside, only one person was in the car and for less than 5 minutes when this happened. It was cool but certainly not cold.
When this happened it was impossible to see out the passenger side or out the back so it was impossible to pull over to the shoulder. Luckily, there were no cars and a left turn where the car could be stopped, the windows opened and the fog wiped out. I can't imagine what would have happened if I had been on the highway.
Car windows were clean, no antifreeze leak that I know of either....no usual suspects. Other cars with recirculating modes do not do anything like this. Cars fog up but not instantly like this.