WEIRD AC problem on a W220
 

Hello everyone. Hoping someone can help me with this problem. The AC is acting very WEIRD, When I turn it ON my wife (passenger) gets a NICE COLD Air, while on my side I'm swetting like a Pig :sweatdrop. This just happend so I have NO Idea what it could be. Can someone or has someone had this problem themselves and is it easy to fix (fuse) or a mechanic needs to look at it. Thanks in advance to anyone that could help me out

Set the temperature controls to the LO on both sides and turn off the AC compressor with the EC button. Then measure the vents. If the left-side vent is still hot, it is almost certainly the (front if you have two) duovalve. Alternatively, you can clamp off the water hose to the duovalve to kill the flow of water to see if it makes a difference.