Hi Guys, I know this is probably a common issue as I have googled so much lately !! however my heater isnt working in my 2004 BA mk2. I keep reading it could be the air mix shaft, or the HIM module? Is there a way or knowing which one it is before taking out the dash ?? The mixer turns to the left and the air con kicks in, works a treat. turn it too the right ( heat ), nothing happens !!! Can anyone suggest some options to do/look at before I start taking the dash out ? Greatly appreciate any help !!!!