Idle speed is to high (cold engine) AAY 2.5i

[Gunther]

Hi!
Since a few weeks I have a problem with the idle speed of my AAY (2.5i) with K-Jetronic.
If I start the cold(!) engine, the idle speed goes to 2000rpm. After ca. 10sec. the speed increases to ca. 2600rpm. If I drive the car ca. 500-1000m, the idle speed is around 1000rpm.
This happens only, if I start the cold engine.
I already cleaned the idle control valve with with break cleaner but nothing changed. 2000-2600rpm are a little bit to high. ;-)

Any ideas?

Best regards,
Gunther

[Gunther]

I found the fault (thanks Dean for your support). I changed the temperature switch on the bottom of the cylinder head.
Now the engine runs perfect. :-)