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Home >> Honda >> 2013 >> CR-Z Base, Automatic CVT Trans >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control >> Evaporator Core & Expansion Valve Replacement

Evaporator Core & Expansion Valve Replacement

  1. Recover the refrigerant with a recovery/recycling/charging station (see REFRIGERANT RECOVERY  ).
  2. Remove the bolt from the A/C line clamp (A).
    Fig 1: A/C Line Clamp With Bolt With Torque Specifications
    G06953745Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Remove the bolt, then disconnect the A/C line (A) from the evaporator core, and the O-rings (B).
    Fig 2: A/C Line And O-Rings With Torque Specifications
    G06953746Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Remove the blower unit (see DUST AND POLLEN FILTER REPLACEMENT  ).
  5. Disconnect the connectors (A) from the evaporator temperature sensor and the power transistor, then remove the connector clip (B). Remove the self-tapping screws, the expansion valve cover (C), and the seal (D).
    Fig 3: Identifying Evaporator Temperature Sensor Connectors, Connector Clip, Expansion Valve Cover And Seal
    G06953747Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Remove the self-tapping screw (A), push the upper cover (B) toward the front of the vehicle, then remove the upper cover.
    Fig 4: Pushing Upper Cover
    G06953748Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Remove the bolts and the expansion valve (A) and the inlet/outlet lines from the evaporator core assembly without bending the lines.
    Fig 5: Expansion Valve With Bolts With Torque Specifications
    G06953749Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Carefully pull out the evaporator core assembly (A), then remove the plate (B).
    Fig 6: Identifying Evaporator Core Assembly And Plate
    G06953750Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Pull out the evaporator temperature sensor (A) from the evaporator core.
    Fig 7: Identifying Evaporator Temperature Sensor
    G06953751Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Install the evaporator temperature sensor in the evaporator core, and note these items:
    • When the evaporator temperature sensor (A) is installed into the new evaporator core, set the sensor into the factory-preset position (B, C).
    • When the evaporator temperature sensor is reinstalled into the original evaporator core, set the sensor into the new position (D, E) because the fin may be deforming by the previous installation.

    Installing into the factory-preset position 

    Fig 8: Installing Evaporator Temperature Sensor In Evaporator Core (Factory-Preset Position)
    G06953752Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Installing into the new position 

    Fig 9: Installing Evaporator Temperature Sensor In Evaporator Core (Factory New Position)
    G06953753Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Install the core in the reverse order of removal and note these items:
    • If you're installing a new evaporator core, add refrigerant oil (SP-10) (see A/C COMPRESSOR THERMAL PROTECTOR REPLACEMENT  ).
    • Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.
    • Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture absorption.
    • Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.
    • Make sure that there is no air leakage.
    • Charge the system (see SYSTEM CHARGING  ).
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