How to Fix the Air Conditioner in a Lincoln Navigator

Written by chris moore
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How to Fix the Air Conditioner in a Lincoln Navigator
Lincoln Navigators came out in 1998. (completely rebuilt image by John Sfondilias from Fotolia.com)

There are three main components of your Lincoln Navigator's air conditioner: The accumulator/drier, the compressor and the condenser. Removing and installing each of these parts involves its own procedure should you need to replace a part to repair the air conditioner. In all cases, you must first have the air conditioner discharged by a licensed technician. You must also drain the engine coolant, loosening the drain plug at the radiator and draining the coolant into a container.

Skill level:
Easy

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Things you need

  • Floor jack
  • Jack stands
  • Wrench
  • Spring lock tools
  • Fan wrench
  • Flare nut wrench
  • Graduated container
  • Refrigerant oil

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Instructions

  1. 1

    Disconnect the electrical connector for the compressor clutch cycling switch, located at the top of the accumulator/drier.

  2. 2

    Detach the inlet-outlet lines. These lines may have threaded fittings that require a wrench, or they may have springlock couplings where you remove the metal clip and then disconnect the lines from the evaporator core tubes using special tools.

  3. 3

    Unscrew and remove the nut on the mounting bracket and slide the accumulator/drier up and out of the bracket.

  4. 4

    Drain the refrigerant oil from the old accumulator/drier into an unused measuring cup and add the oil plus an extra 56.7gr to the new accumulator.

  5. 5

    Slide the accumulator drier into the mounting bracket and tighten its bolt slightly, allowing room to slide and turn the component for now.

  6. 6

    Lubricate the O-rings for the inlet/outlet line connections using refrigerant oil and reconnect the lines.

  7. 7

    Tighten the nut on the accumulator/drier and reconnect the electrical connector.

  1. 1

    Raise the vehicle's front end and support it on jack stands.

  2. 2

    Remove all of the drive belts from the engine, turning the tensioner with a wrench or breaker bar to relieve the tension. Remove the plastic air deflector panel that is beneath the radiator.

  3. 3

    Unbolt and disconnect the refrigerant lines from the compressor using a wrench and disconnect the electrical connector at the compressor clutch.

  4. 4

    Remove the compressor's mounting bolts and remove the compressor from its mounting location.

  5. 5

    Drain the refrigerant oil into a measuring container and add it to the new compressor. If the amount is between 85.1 to 142gr, add an extra ounce. If it is less then 85.1gr, add 85.1gr.

  6. 6

    Install the new compressor with its mounitng bolts and connect the electrical connector and refrigerant lines.

  7. 7

    Reconnect the air-deflector panel, then reinstall the drive belts by turning the tensioner again, slipping the belt back on the pulleys and slowly releasing the tensioner on the belt.

  8. 8

    Lower the vehicle off the jack stands.

  1. 1

    Disconnect the battery cables (starting with the negative cable) by loosening their clamp nuts, then unbolt and remove the battery and battery tray.

  2. 2

    Disconnect all sensors and hoses from the air cleaner assembly, loosaening the hose clamps with pliers or a screwdriver. Unbolt the air cleaner outlet tube, remove the air cleaner clamp, remove the air cleaner element and lift out the assembly's open end.

  3. 3

    Unscrew and remove the plastic air deflector from the radiator, then disconnect the upper radiator hose. Disconnect the lower hose from the degas bottle, then unbolt and remove the bottle.

  4. 4

    Unscrew the clutch nut for the cooling fan and shroud assembly using a fan wrench while holding the water pump pulley in place with the smaller included wrench. Unbolt the fan shroud with a flare nut wrench and lift the fan/shroud out.

  5. 5

    Remove the mounting bolts and upper mounts for the radiator and lift the radiator out of the engine.

  6. 6

    Disconnect the refrigerant lines to the condenser using two wrenches on the fittings.

  7. 7

    Remove the mounting brackets/bolts and lift the condenser out of its cradle supports.

  8. 8

    Pour 29.6ml of extra refrigerant oil into the condenser.

  9. 9

    Install the replacement condenser into the cradle supports and apply the brackets/bolts. Connect the refrigerant lines.

  10. 10

    Reinstall all other components in the reverse order of removal, including the radiator, degas bottle, cooling fan and shroud assembly and the air cleaner.

  11. 11

    Install the battery tray and battery and connect the battery cables, connecting the positive cable first.

Tips and warnings

  • Refill the cooling system after repairing the air conditioner, then return the vehicle to the same technician to have the system recharged.

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