Hey guys, i'm currently having a problem with my digital climate control buttons and display not working. Up until a few weeks ago it functioned properly, but then it suddenly stopped. The only things that work are the screen and button back-lighting, and the manual defrost works. I removed the CC and radio today and tested voltage at the pins according to the fsm and everything check out O.K.

My question is whether anybody who works on the units themselves would have any recommendations on what I might could try on it. I looked at the PCB and didn't see any blown caps or anything burnt. As always, any recommendations are appreciated.

 

They are problematic ,yes a
i would prefer the manual too
it is very crampt under a 300zx dash . The blower is not to operate under 62-65 ?degrees on heat til the heater core warms so as not to blow cold air and if it has a air bubble no flow ,that door servo can seize mine fixed by jumping it and working it back and forth and silicone

 

My problem seems to be the control unit. I will pull the board later and check for broken solder joints.

 

You could have an sensor input open circuit , out of range also
I Cs very complicated
I think I had the same problem but fixed with out replacing the head