How to Replace an A/C Compressor

A/C Compressor Replacement

Safety Tip:
Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or closed toe shoes.

1

Open the hood and locate your vehicle's A/C compressor.
Photo may not be specific to your vehicle

2

Remove the A/C belt from the A/C compressor pulley. May involve loosening the belt tensioner (if equipped).

3

Evacuate the A/C system using a refrigerant recovery machine.

4

Disconnect the negative battery cable.
Photo may not be specific to your vehicle

5

Remove the bolt that secures refrigerant lines to the A/C compressor. Inspect A/C lines for any contamination such as metal or excessive dirt inside of them. If you find any contamination the system will need to be cleaned.

6

Disconnect any electrical connectors from the A/C compressor.
Photo may not be specific to your vehicle

7

Remove the AC connections. Remove the A/C compressor mounting bolts. Remove the A/C compressor from the vehicle.

8

Install the new A/C compressor. Often the A/C compressor installation and warranty will require changing these components; the orifice tube and the receiver - dryer at a minimum.

9

Install and tighten the A/C compressor mounting bolts.

10

Reconnect any electrical connectors to the A/C compressor.

11

Replace O-rings and lubricate the O-rings with oil. Re-install the refrigerant lines and A/C belt to the A/C compressor.
Photo may not be specific to your vehicle

12

Reconnect the negative battery cable.

13

Evacuate air in the A/C system with an A/C servicing machine.

14

Pull a vacuum on the system to check for leaks.

15

If system holds the vacuum, charge the system with A/C servicing machine.

16

Check the A/C system sticker (underhood) for the proper amount and type of refrigerent and oil in the system. (If you have replaced a major component in the system don't forget to replace the amount of oil that was in the component)

17

Insert a Thermometer into the center A/C register

18

Turn on the A/C system with the engine running and check to see if cold air is now coming out of the air duct.

19

If the A/C system is functioning properly the thermometer should read between 30 and 36 degrees F and you may find that your electric radiator fan and compressor clutch will be cycling off and on depending on the outside air temperature.

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