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How-to » Body & Interior » Interior, Heating & A/C » How to Replace an A/C Compressor
 Note: This is a general guide for all vehicles.

How to Replace an A/C Compressor

PARTS
  • A/C Compressor
  • Gloves
TOOLS
  • Flashlight
  • Screwdriver
  • 4 more tools
STEPS
Edit
Hard
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.
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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.
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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.
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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.
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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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