In the baking heat of an Australian summer, you may be thanking your lucky stars that your car is equipped with a healthy air conditioning system. You simply wouldn't be able to survive during your afternoon commute in stop/start traffic without it, even though you take it for granted. However, one day you may notice some very strange behaviour, as the system seems to be cycling on and off for no reason.
While most vehicle owners are not mechanically minded, they can nevertheless tell the difference between a car that is working correctly (or acting as it normally does) and one that is playing up. After all, when you spend a certain amount of time behind the wheel on a regular basis you're going to get used to its idiosyncrasies. So imagine how disconcerting it can be when you start to turn a corner and experience a very strange level of vibration.