Removing
1. Remove the air intake grille of the interior ventilation system (see "Air intake grille of the ventilation system - removal and installation").
2. Disconnect the wiring harness block from the additional heater resistor.
3. Using a Phillips screwdriver, unscrew the self-tapping screw securing the resistor to the heater housing (indicated by an arrow).
4. Remove the resistor from the heater housing.
Comment. The resistance of each of the spirals of the resistor is less than 1 ohm, so they can only be checked with a special ohmmeter or by replacing it with a known good one. You can determine a faulty resistor by the presence of a burnt surface of the spirals. multimeter (in ohmmeter mode) you can determine the open in the coils of the resistor.
Installation
We install an additional resistor and the heater itself in the reverse order.