Q: How to Service the A/C Accumulator on Mercury Grand Marquis?
A: The Refrigerant Discharging and Recovery Procedure must be used to recover refrigerant as the first step for HVAC accumulator servicing. Service personnel must disconnect the evaporator from the compressor suction line through the suction accumulator/drier according to procedures which include spring lock coupling disconnect and connection methods. The service begins with disconnecting the suction accumulator/drier from the A/C evaporator core while protecting the fitting and tube using a back up wrench. First remove the screw which keeps the A/C accumulator mounting bracket in place on the A/C evaporator core then extract the suction accumulator/drier. Unfasten the insulation cover of the suction accumulator/drier before you disconnect its mounting bracket from the A/C accumulator. The installation demands executing the previous removal steps while using PAG compressor oil YN-12-CF7AZ-19589-DA or equivalent which maintains Ford specification WSH-M1C231-B to service the suction accumulator/drier and oiling the O-ring seal with similar PAG YN-12-CF7AZ-19589-DA or other equivalent oil. A back up wrench should be present during installation to protect the fitting along with the tube from damage.
Q: How to service the A/C Accumulator for the 2.5L and 3.0L (4V) engines on Mercury Mariner?
A: Start the A/C accumulator service process of 2.5L and 3.0L (4V) engines by performing refrigerant recovery. The front bumper cover must be removed first when servicing the A/C accumulator. The condenser outlet fitting can then be disconnected by removing its nut to discard the O-ring seal and gasket seal while tightening the new fitting to 15 Nm (133 lb-in) during installation. After disconnecting the A/C pressure transducer electrical connector, perform the outlet fitting nut removal on the A/C accumulator while keeping the new fitting tightened to 15 Nm (133 lb-in). After detaching the evaporator outlet line from the A/C accumulator bracket clip, you must take out the two A/C accumulator nuts and install new ones at 8 Nm (71 lb-in) torque during assembly. Use new gasket seals with O-ring seals when reinstalling the A/C accumulator afterwards while lubricating the refrigerant system with clean PAG oil at the correct quantity. The last operation includes evacuating, then leak testing, and finally charging with refrigerant to the system. Hiring a new A/C accumulator unit must be limited to cases when physical signs show that the A/C compressor failed or the A/C accumulator sustained leaks or physical damage or absorbed moisture after a complete loss combined with extended atmospheric pressure exposure. The technician must avoid installing a new A/C accumulator when any residual pressure remains in the refrigeration system. Repairs can be done to A/C accumulator fitting studs by themselves when these components show physical signs of damage.
Q: How to Service the A/C Accumulator on Mercury Mountaineer?
A: The servicing operation for the HVAC accumulator begins by removing the battery ground cable. The Refrigerant Discharging and Recovery Procedure should be executed afterwards. Using a back up wrench guard the tubes from damage during the disconnect between the A/C evaporator core fitting and the suction accumulator/drier and A/C cycling switch electrical connector. The suction accumulator/drier separation begins by disconnecting its hose coupling from the A/C manifold then the removal proceeds by unscrewing the mounting bracket bolt for extraction. The new suction accumulator/drier should receive the A/C cycling switch for installation. Installation requires the opposite order of disassembly and professional service of the new suction accumulator/drier to accept PAG compressor oil YN-12-C F7AZ-19589-DA or their equivalent which satisfies Ford specification WSH-M1C231-B.