I have an AC problem on my 2007 Aero 8. First, it cycles on and off too quickly. When set to its coldest setting, the compressor will engage for only about 30 seconds at a time, then disengage--it will not stay on and make it really cold. Second, after driving on a hot day, then stopping and shutting down the engine, the AC will not come on at all when the engine is restarted. In fact, the light behind the AC button on the dash will not come on. This will continue as long as the car is driven. When the car is put in the garage and restated several days later, the AC light will come on again and the AC will work (still cycling on and off) again. But, if you stop after a hot drive, it will again fail to come on when the engine is restarted. Any ideas or suggestions. Many thanks