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W211 E320 LHD Blowing cold air problem, need some information

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Dere, Dec 14, 2016.

  1. Dere

    Dere New Member

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    Your Mercedes:
    E320 2005 3.2
    Hi guys,

    A little headache with blowing cold air on W211 E320.

    So sometimes it blows hot air sometimes not.
    Main common problem is heater valve under wipers.
    I expected that, but there is some non-sense about that. Let's say there is one incoming hose to it, 2 pipes to heater core, and one hose outgoing. Then normally those two pipes to heater core would be one is inlet one is outlet (I'm correct?). So lets say engine is warm in working temperature, i took out plastic under the steering wheel, and upper pipe is hot, and down pipe is cold, and interior keep blowing cold air everywhere.

    So as I understand that valve works, so why there is no hot air? Is there some kind valves near heater core or what? Normally if inlet pipe is hot and outlet pipe is cold, something is blocking it. And the strangest thing that lets say 4 days it works OK, and then for a week or so not working, and it starts working again when ever MB wants :)

    Any ideas what and where to check?
     
  2. OP
    Dere

    Dere New Member

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    OK, i expect that MB control heat over outlet, not inlet like in bmw.. so it may be stuck exchange valve... yes?
     
  3. Frontstep

    Frontstep Senior Member

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  4. AMGeed

    AMGeed Senior Member

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    Your Mercedes:
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    Have a look at one that wasn't working to see what can happen to them.
    Pig of a job to replace as well.

    [​IMG]
     
  5. Frontstep

    Frontstep Senior Member

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    Whats that been in the north sea ?
     
  6. mersum1es

    mersum1es Senior Member

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  7. AMGeed

    AMGeed Senior Member

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    It does look like it. That was how it looked when Colin at MBS removed it in Dec 2014.
     
  8. television

    television Always remembered RIP

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    Some people just give them a whack and they come back to life again, but not when they are as bad as the one be Mr Geed
     
  9. AMGeed

    AMGeed Senior Member

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    No amount of whacking would have brought that back to life:D
     
  10. television

    television Always remembered RIP

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    I know :D but there are still some folk who just give them the annual whack
     
  11. Frontstep

    Frontstep Senior Member

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    That seal might be better with a hole in it.
     

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