Hi Hoping someone can help. I have a 2003 BA Fairmont Ghia with an air con that will only work on windscreen & feet. This creates drama with outside windscreen fogging when driving. I have had it in to a tech for 3 days and they didn't fix it. Because I don't know what they are talking about I believed them when they said it needed gasing, o-rings etc. This cost me about $700.00. This time when I take it somewhere I would like to have some sort of an idea of what it might wrong and how long they would need it for. I was told by this last lot they want it for 4 days to pull out the dash. I have had other problems with reversing beepers and electric seat which were all resolved by fixing modules and was wondering if this could be the same sort of thing.

Thanks