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Thread: Dead Heater...?

  1. #1
    Moderator Sulaco's Avatar
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    Dead Heater...?

    Searched, found nothing.

    Last night, it was 20 degrees outside. I'm going for a short drive, and my car is a block of ice (windows frosted inside and out...leaky sunroof). Entire car was frozen up. Anyways, I get in, crank it, and hit the defrost buttons. Rear window defrosts, but the front one never does. I let the car sit there idling and warm up COMPLETELY (to 80C) and the vents never once blew warm or hot air. The air stayed 20F the whole time. I restarted the car, the ACC, restarted everything multiple times thinking maybe it just needed a "reboot." Never got warm. Ended up having to use luke-warm water to thaw out the windshield. In the search, I never found anyone else having no heat in their car. Am I the first?

    Plus, it got vandalized the other night. Someone ripped off my front star and kicked a little chip off my grille. Yay. Now there's 3 seperate issues my insurance company refuses to cover (windshield, hood ornament, and grille).
    94 C280, 250k miles, 1999-2011 (gone, never forgotten)
    CURRENT:
    744 Silver 99 C43 AMG, 260k miles, 2011-
    040 Black 98 C43 AMG, 190k miles, 2013-

  2. #2
    rollinrealbig
    Guest
    sucks to hear that man! good thing i never even use the heater.

    good luck getting it fixed

  3. #3
    In Charge martattack's Avatar
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    Could be the duo-valve being stuck. It's on the passenger side in that covered area where all the computers are. They look like side-by-side D batteries.. give them a light but firm tap with something solid and see if it works then.

    2012 535i
    2005 545i - Retired
    1994 C280 - Retired

  4. #4
    Senior Member
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    Nov 2004
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    1,757
    is there any air coming out of the top vents? if not, then you are looking at a stuck flap or a leaking actuator. if there is air, then as boomingbenz said, it might be the duo valve, and tapping it might help.

    nenad
    2002 S500
    2002 CLK430 w/ 5.5L swap
    2002 SLK32 AMG
    2003 S430 w/ 5.0L swap
    2000 ML55 AMG

  5. #5
    Moderator Sulaco's Avatar
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    Well, it's working now. But yes, there was air coming from the top vents.
    94 C280, 250k miles, 1999-2011 (gone, never forgotten)
    CURRENT:
    744 Silver 99 C43 AMG, 260k miles, 2011-
    040 Black 98 C43 AMG, 190k miles, 2013-

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