you need to hook some gauges up on it and see at least your low side pressure. Just adding cans doesn't always work and like said earlier can actually make it worse. You probably need the system evacuated and recharged to start with. Then start looking for problems.
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Don't bother giving me "rep", I won't return it and I think it is stupid.
Gracie Barra Clearwater
Gyms in Clearwater, St. Pete and Port Richey
pm me if you are interested in trying a free class at any of the gyms.