When

Active pre-heater is defective

Parts required

Active pre-heater

Preparations

CAUTION

Hot surfaces

The column compartment and pre-heater may be hot. Touching hot parts might cause burns. Allow the column compartment and the pre-heater to cool down before starting the service procedure.

Follow these steps

  1. Detach the column holder from the active pre-heater fitting.

  2. Disconnect the active pre-heater from the column.

  3. 12
    Figure: Disconnecting the active pre-heater from the column
  4. Disconnect the pre-heater cable from the pre-heater port that is located next to the lower switching valve.

  5. Pre-heater connection port
    Figure: Pre-heater connection port
  6. Remove the pre-heater cable from the pre-heater cable clip that is located above the pre-heater connection port.

  7. Replace the defective pre-heater.

  8. Connect the new pre-heater to the column. For instructions, see Connecting and Placing the Active Pre-heater.