This knob on the right to redirect to wind screen and foot well is not working. Always directing air at face level. 
 

also is there a way to check if the demister button is working?

 

I believe the demister is only for the rear isn’t it? I ask because the button lights up with no effect. Also the rear windscreen liquid is not coming out. Hearing motor sound though. 
 

ergh. 

Have you had stereo out recently? There’s a cable from the control switch each side that’s very easy to pull out if your pulled the heater controls forward slightly, it will need the stereo out again the reclip it back in 

The previous owner has indeed changed everything by themselves to this Sony on the picture. 
 

I am having trouble finding a good guide or a video to remove this radio and the aircon control to reach to the back and check the conditions of the connections. 
 

do you happen to have a guide please?

10 hours ago, ncsknc said:

The previous owner has indeed changed everything by themselves to this Sony on the picture. 
 

I am having trouble finding a good guide or a video to remove this radio and the aircon control to reach to the back and check the conditions of the connections. 
 

do you happen to have a guide please?

I don’t im afraid, you need to take facia of stereo off then you normally need some release keys to pull stereo out, disconnect stereo then the cage for stereo should pull out with the black surround, then with it all out the way you can normally get a hand in to feel the cables

Thanks! Going in this evening.