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2003 Mercedes-Benz S500 4MATIC Question: sir,new compreesor fix new reciver drier fix cooling is front and rear is ok.but

 

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ishtiaq, Norfolk, VA, April 11, 2012, 09:23
 Rookie

when i start blower then compressor is on.and ac switch(on off)is off.what reasons.pls help me.

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    Carmasters Automotive LLC (105 Answers) , Virginia Beach, VA - (757) 793-2234
    carmaster July 30, 2014, 14:25
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     Journeyman

    Most vehicles when set to any defroster position will also run the A/C compressor to help cool and condense moisture in the air before heating the air and blowing on your windshield (if air heated was not dry your windshield would fog up)

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