conzky,

heres a simple trick to determine if theres a leak in the system: with the engine running, pop the hood check on that thingy (cylindrical with a view glass top) thats connected by tubes to the compressor. then ask somebody to switch on the aircon. initially, bubbles would appear on the glass but would disappear after a while. yung ang normal. if the bubbles dont disappear, may leak yung aircon system mo and malamang ubos na freon. hope this helps...