I can't identify apparent leak in the ac system. I charge in the morning and it works fine almost all day but the next morning ,nothing. I put in a can of stop leak and it worked all day but the now,the next day, it won't take charge and the ac pump doesn't come on . How many switches in the system? I located one on the condenser beside the aftercooler.
Do you have gauges? See any oil residue anywhere? If it leaks that bad, you'll need to add some oil.