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Aircon Blows hot out of center vent and floor vent

4255 Views 3 Replies 4 Participants Last post by  Snijders1977
I have 2002 A Class 190. When I turn on the AC the compressor comes on and the air is cold. As the vehicle warms up I am getting warm to hot air out of the center left and the vent to the floor. After a little more time the warm air takes over and cooler to just to open the windows. You can feel the cool air but not enough.

AC runs and motor cooling fan comes on. Is there a mono or duovalve in this somewhere. I suspect the heater is on and possibly the air flap from the heat box open.

Anybody have this issue? Im in Brasil and it's hitting 38 to 40 the last few weeks. Very Hot.
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I don’t think there is a heatervalve on an w168.
You have a heaterflap.
The heater is always on full heat,but you adjust the temp by redirecting the airflow.
Colder means less air via the heater and more air via the bypass.
Also clean the tempsensor next to your interiorlight in the roofpanel.
Make sure the little fan is working in the sensor.
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