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280SL Pagoda, BMW318
98 Posts
Depends on your system?

You haven't put in a location on your profile, so I can't tell whether you have Euro heating or US heating.

If it's the US system, with climate control, then chances are the temperature wheel is not relaying the correct temperature message through to the hot/cold flap. My advice here is to save your money and get a professional to look at it. They are extremely confusing systems to work with if you don't know what you're doing. I had a similar problem with mine - had to take the whole dash out to replace a $40 potentiometer - but this may not be the case for you, it could be a number of things.

If you have a Euro heating system (3 dials) diagnosis is much easier. Check valves etc.
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