How to replace the A/C compressor?

Yes, you have a leak somewhere, I would try to add pressure to the system to see if you can hear the leak and if not let's use a leak detector to see if you can find it. This guide and video should help us:

https://www.2carpros.com/articles/air-conditioner-leak-detection

and

https://youtu.be/yrhWKlQEPWw

Please run down these guides and report back, then we can give you instructions on how to change out whatever is leaking.

Sure, we got you covered, also check the diagrams below for more of any explanation also read through this guide before you begin. Be sure to lubricate the O rings before you install them.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://youtu.be/4EqdrBVb0sY

A/C compressor Removal and Installation

CAUTION: If installing a new air conditioning compressor due to an internal failure of the old unit, you must carry out the following procedures to remove contamination from the air conditioning system.
- If A/C flushing equipment is available, carry out flushing of the air conditioning system prior to installing a new air conditioning compressor.
- If A/C flushing equipment is not available, carry out filtering of the air conditioning system after a new air conditioning compressor has been installed.
- Install a new evaporator core orifice, as directed by the A/C flushing or filtering procedure.
- Install a new suction accumulator as directed by the A/C flushing or filtering procedure.

NOTE:
- Installation of a new suction accumulator is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator.
- If installing a new A/C compressor, the A/C clutch disc and hub, A/C compressor pulley and A/C clutch field coil must be inspected and transferred from the old unit to the new unit if suitable for reuse.

1. With the vehicle in NEUTRAL, position it on a hoist.
2. If flushing of the air conditioning system has not been carried out, recover the refrigerant.
3. Remove the air cleaner outlet tube.
4. Remove the drive belt from the A/C compressor pulley.
5. Disconnect the field coil electrical connector.
6. Loosen the compressor manifold bolt and detach the compressor manifold.
- Discard the O-ring seals.
- To install, tighten to 21 Nm (15 lb-ft).

7. Remove the line bracket nut.
8. Remove the compressor manifold and tube bracket nut and detach the compressor manifold and tube.
- To install, tighten to 25 Nm (18 lb-ft).

9. Remove the upper LH compressor nut.
- To install, tighten to 25 Nm (18 lb-ft).

10. Remove the 2 upper compressor studs.
- To install, tighten to 4 Nm (35 lb-in).

11. Remove the lower LH compressor stud.
- To install, tighten to 25 Nm (18 lb-ft).

12. Remove the compressor bolt.
- To install, tighten to 25 Nm (18 lb-ft).

13. Remove the A/C compressor.
14. To install, reverse the removal procedure.
- If a new A/C compressor is to be installed, the clutch assembly must be transferred from the old unit to the new unit.
- Install new O-ring seals.
- If filtering of the refrigerant system is not to be carried out, lubricate the refrigerant system with the correct amount of clean PAG oil.

15. If filtering of the refrigerant system is not to be carried out, evacuate, leak test and charge the refrigerant system.

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.