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General E46 Forum
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Old 12-11-2012, 10:54 AM   #1
KY325iMan
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Front defroster issue

Ok...So I finally got where my ac/heat heat is working ok, (after changing outside air temp sensor) but now whenever I turn on the main/front defroster it will only blow warm air, no matter what the temp is set to. Ideas? Thanks as always.....
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Old 12-11-2012, 10:55 AM   #2
scarede46er
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Just the front defroster vent blows warm air or all the vents blow warm air? If the former, that is by design.
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Old 12-11-2012, 11:13 AM   #3
KY325iMan
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Quote:
Originally Posted by scarede46er View Post
Just the front defroster vent blows warm air or all the vents blow warm air? If the former, that is by design.
It seems it's just the defroster vent....I can't imagine why a front defroster would always blow just warm air. It makes it really uncomfortable in the cabin if it's warm/hot outside.
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Old 12-12-2012, 09:19 AM   #4
Redryan98
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front defroster/defogger vent should close when your not using it. That vent should only open when you actually hit the defogger button on your console.

Under normal use when cooling that should be closed and only your front vents (facing out towards you) would be open. When heating (not defogging) the floor vents should always be on.
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Old 12-12-2012, 09:30 AM   #5
scarede46er
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Well, you can turn the switch off. Or turn your AC on if it is hot outside.
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Old 12-12-2012, 12:13 PM   #6
KY325iMan
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Quote:
Originally Posted by Redryan98 View Post
front defroster/defogger vent should close when your not using it. That vent should only open when you actually hit the defogger button on your console.

Under normal use when cooling that should be closed and only your front vents (facing out towards you) would be open. When heating (not defogging) the floor vents should always be on.
Yeah, the defroster vent is closed when not using it..(all the vents open/close properly) When I turn on the defroster/fogger, though, the air it puts out is always really warm, and no matter what I do the temp of the air stays warm. In my crown victoria and every other car I've ever owned, you can adjust the defroster/fogger air temp to more effectively defog the windows, as well as make it more comfortable inside the car. T.hat's why I think something is not working properly.
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Old 12-12-2012, 12:21 PM   #7
scarede46er
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Nope it is by design. http://forums.bimmerforums.com/forum...d.php?t=597288 look at #42
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