Thanks.

I checked the switch that activates the fan and there was no beep from my meter (open?)
Then I checked the pressure switch, and I got the same thing, no beep.
So, I leaked all of my refrigerant or a faulty pressure switch.

I am hoping for a bad switch. I just had all of the o-rings replaced and the system pressure checked, vacuumed and filled with oil and refrigerant 6 months ago. And it was working beautifully until recently.

Will get the pressure checked soon by a professional, but either way, it will need to be recharged? I am thinking once the pressure switch is removed you lose the refrigerant.