1999 230 SLK intermittent aircon fault- help please - Mercedes Benz SLK Forum

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#1 Old 08-24-2011
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1999 230 SLK intermittent aircon fault- help please

During a recent trip to spend a few days up in N. Wales my 1999 230 SLK developed a puzzling intermittent fault. Hopefully you can throw some light on it for me.


The symptoms are :-
When the engine is normally hot the red lights on the EC and Recirc. switches come on and stay on (operating the switches makes no difference) and the electric rad. fan stays on permanently even though the engine temp. stays constantly at 80 degrees. When this happens the rotary heater fan control will not operate at any setting.

When starting the car the following morning everything works and is fine until I switch the engine off when it is hot. Then, on restart, the above situation recurs.

A bit of a pain this weather with no aircon!!!!


Have you or any of your SLK colleagues come across a similar situation and, if so, what did you/they do to cure it?

Grateful for any leads you can provide.

Meanwhile kind regards - Tony D.
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#2 Old 08-24-2011
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#3 Old 08-25-2011
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Hi from London,

Sorry, cant help with your issues but i'm sure someone will be along soon to help!
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#4 Old 08-25-2011
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Welcome from New Hampshire, the Rad fan issue sounds like a K40 problem. Do a search there is tons of info about this know problem.
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#5 Old 08-25-2011
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Hello and welcome from Lichfield.

Sorry I can't help with your problem
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#6 Old 08-25-2011
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Welcome from Michigan..... Hope you get your problem addressed!!
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#7 Old 08-25-2011
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Welcome from Florida

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#8 Old 08-27-2011
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Welcome from Portland, Oregon.
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