Hi, ive just bought a 960 for my mother after her 760 gave up the ghost. The car is very good, but the Air Con switch is flashing constantly. What could cause this? does it just need regassing or is it a more complex thing? The manual says its a big problem if it flashes. I know this may sound like a funny question, but if i can fix it myself its not a major issue has anyone got any ideas? thanks