I Have a 2003 G and i have an A/C that will not turn off when the key is on the on position it also runs when driven the the only way to turn the A/C off is to turn the car completly off, also i can not adjust the temp, so none of the buttons work no light on the buttons either, also the raidio will not turn on at all does anyone know how to diagnoise this problem

Thank you

 

its the radio ****ing it up.. happen to me 3 times now.... i could get it to quit blowing full if i hit the headunit hard..... i mean punch the **** outta it and it will stop or replace the radio

 

It's the circuit board that controls both the head unit and the HVAC controls. Stupid design as when it fails (yes it's very common), the radio screws up and your HVAC goes into default mode.

 

thanks for the advise