Question about 2000 Jeep Cherokee

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Leak in eavaporer coil how do i get to it

Leak in evaporator coil how do i get to it ?a charge lasts about a week .can't find leak in engine compartment

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The evaporator coil is located in the heater-A/C housing, under the instrument panel.

The heater-A/C housing assembly must be removed from the vehicle and the two halves of the housing separated for service access of the heater core, evaporator coil, blend-air door, and each of the various mode control doors.

WARNING: On vehicles equipped with airbags, refer to Airbag Systems Safety Information and Procedures. Before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury. See: Restraint SystemsAir Bag SystemsService Precautions

REMOVAL

  1. Disconnect and isolate the battery negative cable.
  2. Remove the instrument panel from the vehicle.
  3. If the vehicle is not equipped with air conditioning, go to Step 6. If the vehicle is equipped with air conditioning, recover the refrigerant from the refrigerant system.
  4. Disconnect the liquid line refrigerant line fitting from the evaporator inlet tube.
    • Install plugs in, or tape over all of the opened refrigerant line fittings.
  1. Disconnect the accumulator inlet tube refrigerant line fitting from the evaporator outlet tube. See Refrigerant Line Coupler for the procedures.
    • Install plugs in, or tape over all of the opened refrigerant line fittings.
  1. Drain the engine cooling system.
  2. Disconnect the heater hoses from the heater core tubes. Install plugs in, or tape over the opened heater core tubes.
  3. Unplug the heater-A/C system vacuum supply line connector from the tee fitting near the heater core tubes.
Unplug the heater-A/C unit wire harness connector, which is fastened to the heater-A/C housing next to the blower motor relay.
  1. Remove the five nuts from the heater-A/C housing mounting studs on the engine compartment side of the dash panel. Remove or reposition the evaporation canister for additional access, if required.
  2. Pull the heater-A/C housing rearward far enough for the mounting studs and the evaporator condensate drain tube to clear the dash panel holes.
  3. Remove the heater-A/C housing from the vehicle.
INSTALLATION
  1. Position the heater-A/C housing to the dash panel. Be certain that the evaporator condensate drain tube and the housing mounting studs are inserted into their correct mounting holes.
  2. Install and tighten the five nuts onto the heater-A/C housing mounting studs on the engine compartment side of the dash panel. Tighten the nuts to 6.2 Nm (55 in. lbs.) .
  3. If the evaporation canister was repositioned during the removal procedure, reinstall it to its proper position.
  4. Connect the Heater-A/C system vacuum supply line connector to the tee fitting near the heater core tubes.
  5. Unplug or remove the tape from the heater core tubes. Connect the heater hoses to the heater core tubes and fill the engine cooling system.
  6. If the vehicle is not equipped with air conditioning, go to Step 10. If the vehicle is equipped with air conditioning, unplug or remove the tape from the accumulator inlet tube and the evaporator outlet tube fittings. Connect the accumulator inlet tube coupler to the evaporator outlet tube.
  7. Unplug or remove the tape from the liquid line and the evaporator inlet tube fittings. Connect the liquid line coupler to the evaporator inlet tube.
  8. Evacuate the refrigerant system.
  9. Charge the refrigerant system.
  10. Install the instrument panel in the vehicle.
  11. Connect the battery negative cable.
  12. Start the engine and check for proper operation of the heating and air conditioning systems.



Posted on Jul 27, 2009

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Colored dyes are often used to find a leak. the system is charged with the dye, run the sys, look for the colored dye

Posted on Jul 27, 2009

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    to find the leak, trace the refrigerant lines from the compressor to the hoses to the condenser, filter dryer and evaporator.

    look for oil stains. refrigerant leak leaves an oil stain where the leak is.

    but it would be a big job if you have a leak in the evaporator plus you will need a qualified tech to service your vehicle.

    what you can do for now is buy those small charge of refrigerant and if you can charge your system then charge it but be very careful in handling refrigerant. they can be fatal.

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