So my AC control and audio was dead for months now. Temp stuck at 75.
I just bought a face plate with circuit board from a member.
installed the new board on my face plate.
problem didnt go away.

what is the problem? some one PLEASE help me.
I've already checked the fuses, everything is connected

ANY help would be great. I really want to turn of my ac and listen to music in my car for once.

03 G35 coupe. warranty long gone.

 

The power supply in your radio itself has gone bad. The power supply from the radio happens to run the HVAC unit. This not a problem with the so called "audio finisher" or face plate. When the power supply in the radio goes bad, the HVAC gets stuck at a predetermined temperature in auto mode (75F in your case, as was mine) and the whole front radio cluster goes dead.

 

where is this power supply you are talking about? what needs to be done in order to fix this? how did you fix yours?

 

The power supply is within the radio itself. I had Radiomedics fix mine. You can get more info on their website www.radiomedics.com