My 2003 C3 HDi has manual control for the A/C . the fan is a rotary switch 0-5 and the next control beside this is the red/blue rotary control knob. Above them is the button for the A/C which has a small green LED on it , so that when you push the button for the A/C this illuminates. My problem is when the A/C button is not pressed ie no A/C requested, the small green LED will still illuminate when i turn the fan control from 0 to 1 and so on. Is this normal because my handbook does not show this. Next i dont think it is cold enough when the A/C is on ( i can here the fan working when it is ) does this mean i may need gas in it.