Chaps, I've got an endless tickety tock sound coming from behind the console when the ATC is turned on. It sounds like one of the air direction servos or similar trying to switch something on and off but not being successful and so doing it again. I had a look with a torch recently to see if I could see something moving but no luck. The sound seems to be coming from higher up towards the rear of the heater unit. Anyone got any ideas? It's a bit annoying as it's out of time with "Click go the Shears" on my favourite Aussie CD.