I just bought a kenari aero for a few months now. It's a 2 years old car ady. the air cond is not cold. The gas is full. The foreman said all kenari's compressors tend to k.o. after a few years becos it's small n same as kancil's. He recommended to change to a reconded bigger(4 pistons) vitara's compressor. Is it true? Thanks.