2009 C220cdi Heater advice

[lexington013]

Just after some thoughts and advice from the Mercedes specialists.
Recently bought a low mileage 58 plate C220cdi SE saloon.
Got the heating setting on full but interior not getting warm. Any thoughts on my first port of call to look at?
Thanks in advance.

 

[mersum1es]

In order of appearance: Water changeover valve got stuck? Electric circulation pump stuck? Heater matrix blocked? Control flaps (they actually mix the heat) jammed?

 

[mattkh]

............. Control flaps (they actually mix the heat) jammed?

If they ae not jammed, is it possible to hear the flaps moving from inside the car..?

 

[mersum1es]

You can hear them moving but you don't know which flap... need proper diagnosis evice to control them individually. Still my first vote is for water valve...

 

[lexington013]

Thanks guys.