whenever i press front defrost a/c will auto comes on, press auto econ a/c will comes on.
can i go back to dealer to have them re-program it ?

 

why wouldnt you want the a/c to come on?

 

A/C is really a dehumidifier. Thus you would want it when you want to defrost as it will defrost faster by taking humidity out of the air. Auto Econ means use A/C economically, so it doesn't make sense for AC not to come on.

 

if i press the buttom for air from inside the car, the ac has to be there, that really **** me off, especially auto econ and front defrost, winter times all you need is heat i dont know why ac comes on. and i think it hurts ac compressor everytime i turn it on and off....

 

There have been several threads on this. Here is one:

https://g35driver.com/forums/g35-sedan-v35-2003-06/46625-recirculate-without-c.html