W212 Facelift Airco problems

[serdarsz]

Has anyone experienced or know a fix for the Airco issues I am dealing with?

The issue is as followed:

When going on a long trip or high temperatures outside my Airco Stops blowing in the cabin.
I can hear the blower running but dos not blow in the cabin through the vents.
The Airco is properly filled as well.

When I looked at the heater blower the flaps are closed preventing cold air entering the interior of the car. When I manually move these flaps it blows in (which is not advised) but it wont be automatically regulated.
When I turn of ignition for a few minutes and start up sometimes it will react and the flaps work as intended.

When I read for fault codes i cant see anything...
Only strange value I see is B10/38. Rear foot well vent air outlet temperature sensor = -50, I removed the seat and covers but couldn't find such sensor...

Anyone experienced and knows a how to this or knows a solution?

 

[Fotom]

As far as I remember there are several temperature sensors in the 212 models, they stick in the vent outlets.

Unfortunately my EPC has broke down yesterday so I can not tell you the correct place but take a look at 7zap for your car and check the temperature sensors, they stick in the outlet, but somewhere back in.

If one or more are broken (and -50° indicates that) the HVAC will not work correct but will also not give any DTC.

 

[Mersovod]

Remove the middle console and check the wiring and internal resistance of the sensor. Based on the test results, replace the sensor.

 

[xsesiv]

-50 does seem like the sensor is bad or disconnected. Have you tried manually actuating the air flaps in Xentry to ensure there's no mechanical fault with them? From memory you can also re-initialize the air flaps and then normalize them in Xentry.

 

[serdarsz]

Manuel moving the airflaps works so I assumed it was a sensor or regulation issue. But never done a re-initialization.