Ek hatch, started having issues with not getting power to the three buttons on dash( recirculate, ac and rear defrost). I noticed if I turned my lights on the the buttons became active and ac worked fine. Not sure if it's the heat but recently when it been really hot it no longer comes on . I have had a few instances where when I go to start my car the ac works with the power on but when I turn the key to start it cuts off and again no power to the buttons. I've also been able to get it to work sometimes by turning the car off while going down the road and turn the key to power on and pop it back in gear without turning the key. Any idea what part or fuse I should start with ? When it's on ac works fine and blows cold.