Have noticed that my fans do not work when you turn the dial to diffrent speeds. Is this common and easy to fix or do i need a new unit? Also the air-con comes on everytime i start the car i know some cars it comes on when you turn the setting to demist but it doesnt matter what setting its on it always comes on. I turn the ignition on air-con comes on switch it off enter code and start car and it comes on again not a problem just anoying, does anyone else have this? Thanks.