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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 11-18-2012, 01:40 PM
Bear77 Bear77 is offline
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Mein Auto: '04 325iT
Why does my front windshiled defogger only blow hot?

I seem to be having an HVAC issue. My front windshield defogger only blows hot air, regardless of the temperature setting or whether or not the A/C is on. Anybody else ever deal with this?
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  #2  
Old 11-18-2012, 02:06 PM
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Fast Bob Fast Bob is offline
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HOT is the default position because that`s exactly what`s needed to de-fog (or de-ice) a windshield. Having the A/C on doesn`t make it colder, it just pulls more moisture from the air, assisting the defogging process.
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Old 11-18-2012, 09:25 PM
Bear77 Bear77 is offline
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OK, so this is normal? I'm used to being able to adjust the temperature on the defogger as on every other vehicle I've owned. Interesting...
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Old 11-18-2012, 09:36 PM
E46_Ci E46_Ci is offline
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It is normal... Another thing these cars do, with regard to defrost, is when your wipers are on there is a steady flow of warm air from the defrost vents at the base of the windshield to keep it clear of fog.
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