My son just bought a 95 Accord and when trying to get the windows to defog he found there is no air coming out of those vents. Air blows fine out of all the other vents, just not the ones up by the front window. I will note that until I just read other threads here we did not know that the a/c should be turned on with the defogger. Would that make any difference? I would think some air should be coming out of the vents when the defogger is on, even if the a/c is not. What do you all think could be the problem?