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    mercury marquis 2005 heater wont shut off

    My Mercury Marquis has an EATC. No matter what temperature I choose, only heat comes out. Yesterday I could hear a clunking sound as if a door were opening and closing but the air conditioning was working fine. This morning the temperature was changed from 70 to 77.  After that, the temperature stayed hot, no matter what.


     


     

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    0  Views: 868 Answers: 1 Posted: 11 years ago
    Tags: mercury grand marquis eatc
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      1 Answer

      Sounds like the blend door (core regulator) on the heater core is stuck. You will need a mechanic for this. 

      11 years ago. Rating: 2
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