[W126 Coupe] Air Conditioning Diagnosis

[Dan Landiss]

Once again I ask this groups combined wisdom for help with my coupe. 
After all, who knows them better?

The air conditioning season has hit Saint Louis. Mine cools well until 
the engine warms up, and then I can feel hot air from the heater vents 
at each end of the dashboard, while cool air is still coming from the 
vents just below those. Air to the base of the windshield seems to be a 
mixture of heated and cooled, but hard to tell for sure.

Your opinions? Am I looking at the monovalve, or the dreaded air flap 
buried under the dash? Maybe something EASY for a change<G>?

Thanks in advance.

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"We have become morally ill because we have become accustomed to saying one thing and thinking another."  --Vaclav Havel <http://www.landiss.com/civillib.htm#1Jan90>

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