why do i see like vapor on the air vents when i turn on A/C on my truck ?
Could be seeing the heat from the windshield raising or a vaccum leak
Under high humidity conditions some vehicles will do that. My '94 Ford Escort used to do that sometimes. If it's annoying try adjusting the air temp control to a slightly warmer position. HTH. -Jim
I'm going to say the heater core is leaking. Is there a film on the windshield? Then your replacing the heater core.
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