When driving at a long distance smoke like c omen out the ac vents then it won't blow air out the vents
Jun 7, 2015 at 12:52 AM
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WRENCHTECH
✓Experienced Mechanic
20,760 POSTS
I suspect the condensation on the evaporator may be freezing up to the point it creates a large block of ice that air won't pass through. This usually happens when you run the blower speed very low for a long time. The system should have a temp thermostat at the evaporator that is designed to avoid that but it could be faulty. You need an AC expert to troubleshoot the issue.