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Home >> Honda >> 2012 >> Odyssey EX >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating/Air Conditioning >> Front Expansion Valve Replacement

Front 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 Torque Specification
    G06968219Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Remove the bolt, then disconnect the A/C lines (A) from the front evaporator core, and remove the O-rings (B). Separate the guide (C) from the front expansion valve.
    Fig 2: A/C Lines, O-Rings And Guide With Torque Specification
    G06968220Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Remove the blower unit (see BLOWER UNIT REMOVAL/INSTALLATION  ).
  5. Disconnect the connector (A) from the front power transistor, and detach the harness clips (B).
    Fig 3: Identifying Front Power Transistor Connector And Harness Clips
    G06968221Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Remove the self-tapping screws, the expansion valve cover (A), and the seal (B).
    Fig 4: Identifying Expansion Valve Cover And Seal
    G06968222Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Remove the bolts, then remove the inlet/outlet lines (A) and the O-rings (B).
    Fig 5: Inlet/Outlet Lines, O-Rings With Mounting Bolts Torque Specification
    G06968223Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Remove the guide (C) and discard it.
  9. Remove the insulator (A) and the bolts, then remove the front expansion valve (B) and the O-rings (C).
    Fig 6: Insulator, Front Expansion Valve, O-Rings And Guide With Mounting Bolts Torque Specification
    G06968224Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Install the front expansion valve in the reverse order of removal, and note these items:
    • 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.
    • Charge the system (see SYSTEM CHARGING  ).
    • Make sure that there is no air leakage.
    • Make sure that there is no refrigerant leakage.
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