Question about 1990 Volvo 240

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White smoke from air vents

Why is white smoke coming from air vents when I shunt down the cooling effect on my car AC

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  • Anonymous Mar 14, 2014

    electrical fire smoke

  • Anonymous Mar 19, 2014

    smoke from air vents

  • Anonymous Mar 21, 2014

    it does not appear to be water vapor because the windows are hard to clean

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White smoke (but doesn't smell like buring?) could be a leak in the heater core. Your may need to have the core replaced.

I had this problem on my '90 S70 - except that it happened all at once - filled the car with white smoke while I was doing 70 on the freeway. Couldn't see a thing, lucky I didn't get killed. Mechanic told me that was more typical to get little bits of white smoke rather than a catastrophic failure like I had.

Posted on Sep 28, 2008

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Could be an incorrect refrigerant charge or defective pressure switch causing the evaporator to freeze and the air flow over it is causing the ice to melt and the resulting white smoke is condensation

Posted on May 15, 2008

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