This explains, possibly, why my 2004 RX 330 operates in this way.. if the high side pressure gets too high, it cuts off the AC condenser. Strangely enough, my air conditioning works far better when I have it a little bit low on refrigerant. When I reduce the level of refrigerant to the very low end of normal, almost at the point where it says it is undercharged, the air conditioning works perfectly. Is this possible Because when the refrigerant is slightly low it reduces the high-end pressure and keeps it below the level where it would switch off? Please respond with any thoughts to this strange situation.
Bruce
