Attention: The fan draws outside air into the drainage channel. There is a grate on the inlet pipe. Despite this, small leaves can get into the fan and produce annoying noise during its operation. In this case, you need to disconnect the plastic bracket on the grill, remove the grill and try to remove foreign objects from above.
Fan Motor Troubleshooting
If the fan does not work in any position of the switch, check the fuse first.
If, despite a good fuse, the windshield wiper does not work either, the cause may be in the contact relief relay.
Free access to the fan motor.
Disconnect the plug on the fan motor, connect the two auxiliary wires to the contacts now shown.
If the fan motor is good, it should run at full speed. If not, replace it.
If the fan only runs at full speed, the overheat fuse on the resistor board may be blown.