AC clutch not engaging

Hi. Haven't ran my AC in a while since it has been cool out. We have a warm snap in Florida now and when I turned on the AC it was just blowing warm air. It worked fine before hand. I have checked the fuses but I did hear the relay in the cabin clicking. Weird thing is that before I started looking into the electrical I tried to see if it needed a charge. It didn't register anything when I hooked the hose up and as I tried to add some it didn't seem to take. I am hoping it is just the relay but am confused. Thanks in advance for any help.