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Old 14-12-2016, 09:34 AM
Dere Dere is offline
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Default W211 E320 LHD Blowing cold air problem, need some information

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?
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Old 14-12-2016, 10:29 AM
Dere Dere is offline
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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?
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  #3  
Old 14-12-2016, 11:58 AM
Frontstep Frontstep is offline
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You could clean it,

or replace it http://www.benzworld.org/forums/gene...r-problem.html
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  #4  
Old 14-12-2016, 01:01 PM
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AMGeed AMGeed is offline
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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.

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Old 14-12-2016, 01:35 PM
Frontstep Frontstep is offline
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Quote:
Originally Posted by AMGeed View Post
Have a look at one that wasn't working to see what can happen to them.
Pig of a job to replace as well.

Whats that been in the north sea ?
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Old 14-12-2016, 02:39 PM
mersum1es mersum1es is offline
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my valve:
http://forums.mercedesclub.org.uk/sh...6&postcount=13
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Old 14-12-2016, 02:59 PM
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Quote:
Originally Posted by Frontstep View Post
Whats that been in the north sea ?
It does look like it. That was how it looked when Colin at MBS removed it in Dec 2014.
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[SIGPIC]Secondary cats & resonator deleted x-pipe fitted. Carbon diffuser. Lowering links.

At some point in life, everyone has gambled on a fart and lost.
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Old 14-12-2016, 03:05 PM
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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
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Old 14-12-2016, 03:51 PM
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Quote:
Originally Posted by television View Post
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
No amount of whacking would have brought that back to life
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[SIGPIC]Secondary cats & resonator deleted x-pipe fitted. Carbon diffuser. Lowering links.

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Old 14-12-2016, 03:54 PM
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No amount of whacking would have brought that back to life
I know but there are still some folk who just give them the annual whack
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