To maintain and fix the HVAC accumulator, first, take the battery's negative cable off and then capture the refrigerant from the device. Unplug the wire harness from the A/C low pressure switch and remove the plastic retaining clip that holds the suction line to the liquid line beside the accumulator. After that, unscrew the two nuts connecting the refrigerant lines to the accumulator and detach the lines, throwing away the seals from the fittings. Place plugs over the opened refrigerant line fittings and accumulator ports and loosen the nut securing the accumulator bracket to the dash panel. After removing the accumulator and band from the housing, work the accumulator and band forward until the bolt moves past the slotted hole and pull the entire assembly from the engine compartment. In case you need to, pull the A/C low pressure switch out from the accumulator. When replacing the accumulator, first add 90 milliliters (3 fluid ounces) of the right refrigerant oil to the refrigeration system. If you decide to remove the switch, install it on the accumulator with a new seal and tighten it securely. Align the accumulator into the support bracket hole and bolt it down so the retaining band is tightened to 4.5 Nm (40 in. lbs.). After opening the refrigerant line fittings and accumulator ports, take away the tape or plugs, lubricate new rubber O-rings with clean R-134a oil, place them on the openings and use only the recommended O-rings for your system. Attach the refrigerant lines to the accumulator and add the two nuts to join them, tightening each to 2.2 Nm (20 in. lbs.). Put the plastic retaining clip for the suction line onto the liquid line and connect the wire harness to the A/C low pressure switch, reconnect the battery negative cable, evacuate the refrigerant system and charge it.