I have an 04 RX8, 6 speed, and I just experianced the problem of NO power at all to the center console, no radio, display, and none of the air controls function except the levels of power, and it only does hot (Thank God it's winter). But I have a Metra HG kit installed for a double din, my old one just went out and this was the second to go a few days after my Kenwood went out, Best Buy said I would need a new Metra part that controlled all of the power in the little box, so I ordered a new kit and it will be here tomorrow, going to try that piece and see if everything turns on alright. Now if that is not the problem at all then what is it?

Metra Tech Support sent me to https://www.rx8club.com/series-i-do-yourself-forum-73/diy-no-heat-repair-heater-control-158200/

But I just don't know if that will solve the problem, Please help me..

 

Did you check the fuse box?

 

Yeah.