Before removing and replacing the heating system fan, the instrument panel must be removed, and must be disconnected from the "minute" of the battery. Then, press the retainer and rotate the heating unit fan counterclockwise for a quarter of the rotation.
Then carefully remove it and disconnect the connector from the fan electric motor. The ventilator is done in one case with the engine, so the entire assembly is switched. You can also drill down and detach the fan from the engine for repair. The assembly of the repaired or new node is in reverse sequence.