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Why is my AC hot in front and cold in the rear?

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mark22
Posts: 22
Joined: Mon Dec 19, 2011 6:58 pm

Why is my AC hot in front and cold in the rear?

Post by mark22 » Sat Jun 22, 2019 12:07 pm

Just as it says, my 87 M6 blows ambient air out of the front vents (above and above the stereo) yet the rear console is ice cold? What might cause this?

Thank you!
1987 M6 pre 6/87

rhanley 635csi89
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Location: Arden, NC 28704
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Re: Why is my AC hot in front and cold in the rear?

Post by rhanley 635csi89 » Sun Jun 23, 2019 1:53 am

There's a part which BMW calls a voltage regular valve for A/C mounted in engine bay, IIRC part 64511380659, This valve becomes inoperative, it can be taken apart, cleaned or replace it. There are write ups which claim when this valve is functional the front A/C blows cold and is often over looked. My front doesn't blow cold and this will be my starting point. There are many write ups on the A/C systems, do a search on the forums.

https://www.bimmerforums.com/forum/show ... -Regulator!

Please post your location in your profile. There may be a member close to you that could be a help to you.

Roger

Edit: added link
89 635CSiA (11/88 build)
AlpineWeiss II (218)/Natur(0200)
87 L6 635CSI Sold
87 MB 560SL

ron
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Re: Why is my AC hot in front and cold in the rear?

Post by ron » Mon Jun 24, 2019 9:09 am

rhanley 635csi89 wrote:
Sun Jun 23, 2019 1:53 am

Please post your location in your profile. There may be a member close to you that could be a help to you.
They are ALWAYS rustier than you thought!!!!!!
'85 M #228
'87 M #367
'88 High line.
'80 735i
'10 X5

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