Q: How Do You Replace an Air Conditioning Compressor?
A: If you're replacing the compressor, also replace the accumulator. Have the air conditioning system discharged. Disconnect the cable from the negative battery terminal. Raise the vehicle and secure it on jackstands. Remove the accessory drivebelts. Unplug the electrical connector from the compressor clutch. Disconnect the refrigerant lines from the compressor. Plug the open fittings to prevent entry of dirt and moisture. Be sure to remove and discard the old refrigerant line fitting O-rings. Disconnect the high pressure cut-out switch from the back of the compressor. Remove the compressor mounting bolts and then remove it from the vehicle. If a new compressor is being installed, pour out the oil from the old compressor into a graduated container and add that amount of new refrigerant oil to the new compressor. Also follow any directions included with the new compressor. The clutch might have to be transferred from the original compressor to the new unit. Installation is the reverse of removal. Replace all O-rings with new ones specifically made for use with R-134a refrigerant and lubricate them with R-134a-compatible refrigerant oil. Have the system evacuated, recharged and leak tested by the shop that discharged it.