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Discussion Starter #1 (Edited)
Hello,
98 E300. The driver side far left vent blows hot air with the a/c on "lo" while all the others are cold. Eventually it changes to cool but not fast enough. Any ideas or specifics?
Thank you.
 

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Discussion Starter #2
Today I ran the diagnostic mode and found no problems with the system, except for the light sensor. Any ideas?
 

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Was the duo valve the problem? It can certainly cause the symptoms your experiencing. A low A/C charge can also cause it as well.
 
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