HOT Rear A/C (Valve Replaced Twice)
Thread Starter
MBWorld Fanatic!
Joined: Apr 2012
Posts: 1,274
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From: Seattle
2008 Mercedes Benz E63
HOT Rear A/C (Valve Replaced Twice)
I put two different new heater control valves in my car and still have hot as death rear a/c. I put 12v to the valve that came out. It worked fine. I have access to star wiring and it runs directly to the front SAM. There were no cross shorts in the wiring.
Has anyone else had this issue and did replacing the SAM fix it? I've read everything I can find on the issue. I have found one person that said replacing the SAM fixed their problem, but he had faults for it. I have no AAC or SAM faults.
Thanks for any input.
Has anyone else had this issue and did replacing the SAM fix it? I've read everything I can find on the issue. I have found one person that said replacing the SAM fixed their problem, but he had faults for it. I have no AAC or SAM faults.
Thanks for any input.
Senior Member
Joined: Jun 2014
Posts: 471
Likes: 32
W211 E55 2003
i remember there was a thread about this.. in front sam the chip that controls that valve/ac was bad and a elecric store could change it and it started working. otherwise u need new sam. ill try to dig it up
Senior Member
Joined: Jun 2014
Posts: 471
Likes: 32
W211 E55 2003
heres the links.. seems like you even commented on that thread :P
https://mbworld.org/forums/w211-amg/...olvalve-2.html
From post 36 -->
https://mbworld.org/forums/w211-amg/...olvalve-2.html
From post 36 -->
