So if you notice the compressor clicking on and off very quickly, you are more than likely low on refrigerant. There is another thing that will cause this same condition, a bad low pressure switch. There is only one place in the system where it can become restricted, the orifice tube. If you remove and clean or change the orifice tube, this will correct the problem, for now. Over time the glass beads will break down, and contaminate the system.
All auto manufacturers recommend the accumulator be changed every two years.
And it needs to be replaced any time the system is opened or exposed to moisture. A lot of mechanics let this slide. If they do, you will encounter unnecessary repair bills in the future. There are a few more little problems you can find on air conditioning systems, but I don't really have the time to cover them here. All rights reserved.