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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 09-30-2013, 12:33 PM
Lee Roy Lee Roy is offline
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Location: NY
 
Join Date: Sep 2013
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Mein Auto: 328XI
328XI Vent Temp 10 Degrees Higher Than Outside Temp

I have a 2011 328XI with standard Climate Control. With AC off
and blue / red wheel set to blue, and temp set as low as it will go (60 degrees)
vent temp is at least 10 degrees higher than outside air. This happens on auto
mode as well as manual. No recirculate on. Dealer says this is normal. I find
that hard to believe.

Thanks in Advance.

Lee
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  #2  
Old 09-30-2013, 01:01 PM
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Zooks527 Zooks527 is offline
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Location: Mansfield, MA
 
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Mein Auto: 2009 335i xDrive coupe
Sounds normal to me, assuming you're doing the measuring with the car stopped in place.

There's no way you're going to get the temperature lower than the outside air temperature without the A/C compressor. If you're on straight outside air, it's coming in through a ducting and filter system that's starts under the hood and ends behind the dash, both areas which will likely be higher than ambient due to the temperature of the engine compartment. If you're parked, you'll also be in a big stagnant pool of air being warmed by the car.

10 degrees above outside in an idling car parked in one place wouldn't surprise me. If the car were in motion and the fan was on high, I would only expect 2 - 4 degrees above outside.
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2009 335i xDrive coupe, Jet Black, Black Leather, Grey Poplar, Steptronic, ZPP, ZSP, ZCW, iPod/USB, HD radio, Parking Assist. Rear Fogs, Hardwire V1, ProFit G3.
ED May 12, 2009, Munich dropoff May 16, Redelivery June 22, 2009




Prior 33 years of cars: 1967 BelAir wagon / 1968 LeMans Tempest / 1970 Mustang Mach 1 / 1972 El Dorado / 1978 Corvette (kept until first Bronco) / 1981 Subaru GL wagon AWD / 1983 s10 Blazer 4x4 (big mistake) / 1985 Bronco 4x4 / 1996 Bronco 4x4 / 2004 Passat 4motion

Last edited by Zooks527; 09-30-2013 at 02:41 PM.
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  #3  
Old 09-30-2013, 01:29 PM
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need4speed need4speed is offline
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Mein Auto: 09 335Cabrio zsp/11 335d
+1. The outside air comes through/near some very warm places to get to your vents. N4S
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Old 09-30-2013, 03:19 PM
surfcity335i surfcity335i is offline
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Mein Auto: 2012 335i M-Sport
Quote:
Originally Posted by Lee Roy View Post
I have a 2011 328XI with standard Climate Control. With AC off
and blue / red wheel set to blue, and temp set as low as it will go (60 degrees)
vent temp is at least 10 degrees higher than outside air. This happens on auto
mode as well as manual. No recirculate on. Dealer says this is normal. I find
that hard to believe.

Thanks in Advance.

Lee
I had an Infiniti FX 35 and the dash vent temps were over 100 degrees when ambient temps were 70! Dealer and Infiniti told me that it was normal and to always have the a/c on. Dopes.

10 degrees I could live with and probably is normal considering where the air is coming from and the temp of the ducting it's traveling through.
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  #5  
Old 09-30-2013, 09:20 PM
Tom K. Tom K. is offline
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Location: Maryland
 
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Mein Auto: '07 328iT.'13 Boxster
The trick is to open a window when ventilation (but not A/C) is needed. Unfortunately when it is raining, this means the compressor often needs to be run to avoid fogging.

Tom
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  #6  
Old 10-01-2013, 03:08 PM
hellosopo hellosopo is offline
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Location: New England
 
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Mein Auto: 2011 E90 328xi N51
I've found if it's more than about 50 degrees outside, I need the A/C on for the climate control system to be able to maintain 70 degrees. Otherwise it is too warm, as you noticed.
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