hectormb

Hi! My W205 2015 C300 4Matic is not blowing hot air from the passenger side. It correctly blowing hot air from driver side. A/C is working perfect (cold air when needed from both sides). Need help to diagnose the problem. Maybe a diagram for the Actuators or diagnostic for the Valve, etc.. Any help is greatly appreciated!

MBGinnieNot

There is a harness that goes from the driver side into the passenger side behind the climate controls that connects all 4 actuators and other temperature sensors. First thing I would personally do is remove all 4 actuators and verify their operation (you can do that with a scan tool) and then make sure all flaps moved freely (without the actuator). I am almost certain that you will identify the problem by doing that... fair warning: behind upside down under the dash
it is not the most comfortable position

hectormb

We will try that!!! 👍🏼