Trying to diagnose my A/C issue. First thing I notice is when I put the climate control to 16 degrees auto, only 3 bars show up. Its currently +30 outside. Plugged it into INPA and it shows my interior cabin temperature is 10 degree. Which lead me to believe I have a faulty IHKA.

I removed the IHKA and try a different one, same thing happens. I then put my original one into my friends E39 and on 16 degrees it goes full blast A/C. So I have a working IHKA, how do I prevent the 10 degree reading in my cabin?