I've got an 04 wrx and everytime I turn the aircon on it makes like this loud PFFFFTTT noise some times quit loud and other times barely noticeable, it happens every 20 or so seconds and what seems to be like a loss of power for a split second the mechanics said it was the aircon compressor so got a new one installed only to find out the noise is still happening. The aircon works fine.
Can anybody help me out please