Arrived on, 08/21/23- Kayden- On arrival found that fan was not working properly. Ran to supply house and got fan. Turned unit on and found that unit was low on refrigerant. Added refrigerant and watched unit drop to temp. Will return to leak check and further check. Returned on, 08/22/23- Kayden- Removed covers to the unit and began to leak check. I found the packing nut on the high side service valve leaking, so i tightened it to stop the leak. I went over the rest of the unit, but didn't pick up on any additional leaks. Pressures are still good and unit is cooling.