You can have the A/C Climate Control Amp checked with a CONSULT computer at a dealership to see if it's working. It's a cheaply made, proprietary circuit board in a white box that sits behind the climate control ***** that Nissan uses in our Z and is prone to failure. New, they're ridiculously expensive. Used, expect to pay between $100 and $150. Get one with a return warranty if you go used. It's a simple ribbon cable connection in the back. There are YouTube how-to videos on this, I'm sure.

 

I had a similar issue recently. It was the ac box ribbon. It looked good visually. I just pulled the shifter surround, started the car and tried pushing and playing with the connection to the *****. At some angle I got it to work but quits right when I let go. That told me the connection to the ***** was bad. I ordered a used box and replaced just the cable. The cable is totally replaceable. Just take out the screws to open it. There is a flip attachment that needs to be lifted. Hard to explain but it becomes clear when you open it.

 

Sometimes the solder joints between the connector and the board go bad too. A quick one-over with an iron can often work wonders.

 

Will a 07 a/c amp work on my 03 ?
Thanks

 

From what I have read the answer is no. Those who did the 06+interior swap had to swap that as well meaning they are not compatible.