A/c is not working freeon in the system also all relay has been tested, compressor has been tested all are good. so what can be the problem

Freon in the system does the A/C compressor cycle ? if it doesnt then its a switch problem ranging from a/c button to the low pressure cycleing switch, the most prominenet failure will be the low pressure cycle switch,Thats if its not cycling, Now if it cycles then your expansion valve will need to be replaced