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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 11-26-2011, 10:51 PM   #1
davesalkin
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Join Date: Aug 2011
Location: Milwaukee WI
Posts: 18
My Ride: 04 330 XI
Defrosting heat

Hi:

On my 04 330XI when the temp is about 50 degree's outside. I turn on the defroster to clear the windows. It clears the window but this huge blast of heat comes out. How do I control the temp? I have it set on lowest temp 59 inside the car, is it because it is 50 outside that the defroster blasts heat? I turn on the a/c at the same time but the air is still very warm? What would anyone suggest?

Thanks

Dave
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Old 11-26-2011, 10:55 PM   #2
LittleChrist12
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Join Date: Jan 2010
Location: Albany, NY
Posts: 533
My Ride: 2003 BMW 325xi
Defrost, by nature, is designed to melt frost and ice off the windscreen. If you want to defog without melting your contacts to your corneas, turn on the A/C and the "Up" vent and increase the fan until it starts to take care of the fog. This will run the air through the defroster vents with whatever temperature you have set, rather than the preset "Defrost" option.
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Old 11-27-2011, 05:54 PM   #3
tomoyer
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Join Date: Aug 2011
Location: Reading, Pennsylvania
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My Ride: 03 325xi, 03 330xi
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For light fog, best to use the AC on the upper/windshield setting and adjust your temp and fan spend. Not only will it defog the windows, it will also pull moisture out of the car more so than on the defroster setting (though in defroster mode, the AC compressor does run, but temperature is harder to adjust so that it isn't too hot/warm.
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Old 12-03-2011, 02:49 AM   #4
steve108819
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Join Date: Aug 2011
Location: Springfield, Mo
Posts: 62
My Ride: 2002 325xi
Quote:
Originally Posted by davesalkin View Post
Hi:

How do I control the temp?
Dave
You don't. If you're pushing the defrost button, the owners manual states that the car runs a defrost "program". It's going to be hot air. Follow the previous suggestions if you want it different.
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Old 12-03-2011, 09:02 PM   #5
xi_ter
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Join Date: Nov 2006
Location: Edmonton, Canada
Posts: 2,221
My Ride: 2003 325xi
Can you park the car in a garage? Anything damp in the car? You might also try wiping your windows with an anti fog coating.
I really never have fogged or frosted windows and it's cold here now.
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Old 12-05-2011, 12:26 AM   #6
Viktimize
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Join Date: Jun 2011
Location: Edmonton, Alberta
Posts: 278
My Ride: 2002 325i,2003 330ci
I don't mind the heat blast when the defroster turns on, but I'm not very fond of the defroster trying to crack my windshield everytime it turns on by putting the fan to full speed.
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