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2001 Mercedes-Benz ML320

Question: the AC blows but the heat will not work, what is the problem?

Question

Visitor, Hamden, CT, January 31, 2011, 12:08

The problem just started two days ago. the heat usually warms up quite quickly.

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  • Answer #1

    overbys from Overbys Inc, January 31, 2011, 13:52
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     Master

    low on coolant, defective water valve, defective "blend"
    flap or motor, a blocked heater core, an electrical issue
    in the climate control unit

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  • Answer #2

    Autotronics Auto Repair from Autotronics Auto Repair, January 31, 2011, 16:21
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     Enthusiast

    Bad Heater Control Valve

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