Car interior fan (Fiesta 4)

Air circulation in the cabin of all Fiesta models is provided by a four-speed centrifugal fan. The fan is located in the center under the dashboard near the engine compartment bulkhead, in front of the heater radiator. Additional resistors stepwise change the supplied voltage, which ensures a change in the rotation speed of the fan electric motor. At the fourth speed, the fan operates at maximum rotation speed. The fan power is always sufficient to ensure air circulation in the cabin regardless of the vehicle speed.

Removing the fan

SEQUENCE OF WORKS

1. If the fan does not work, first check the fan fuse under the instrument panel (fuse #16).

2. If the fuse is OK, check the fan switch. To do this, you need to remove the control unit.



Fig. 16.6. Location of the universal contact connector (top) of the fan switch



3. Disconnect the universal contact connector from the switch and check for voltage at its contacts (Fig. 16.6). If there is no voltage, check the condition of the wire from the fuse box.

4. Using a universal measuring device, check the operation of the contact groups in all switch positions.

5. It is better to replace a faulty switch, as practice shows that there is no point in repairing a faulty switch.



Fig. 16.7. Location of the bolt (1) securing the switch and the direction of rotation (2) when simultaneously pressed to remove the switch from the control unit

6. Unscrew the switch mounting bolt, press and simultaneously turn the switch clockwise, remove it from the control unit (Fig. 16.7).

7. If the switch is OK, check the ground connection of the fan motor.

8. If the connection to the "ground" is reliable, then the fan electric motor is faulty (burnt carbon brushes or shorted armature windings). We recommend replacing the electric motor in a car repair shop.

(The text was obtained in its entirety from the specified website FordBook.ru)