Quote:
Originally Posted by CyberMaarten
An AC always has huge pressure in it: 15 bar. Also when it's off.
So even when there's a small leakage (often the case), it makes no difference in coolance liquid/gas whether it is on or off.
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No, that pressure only exists on the high pressure side during running, it can be as high as 35 bar in really hot ambient conditions, the low pressure side of the system is generally around 4 bar. When the system is turned off both sides equalise & you get a static pressure of about 6 bar throughout the system. And yes, it does make a difference as you are keeping the seals lubricated on the compressor, running your A/C at least once a week will drastically slow down the escape of refrigerant.