Radiator cooling fan — removal, inspection and installation (Peugeot 405)

Voltage is supplied to the fan through the ignition switch, a fuse and a thermal switch, which (on most models) installed in the radiator. On models with air conditioning, the cooling fans are controlled by a "Bitron" sensor.

Examination

1. If the fan does not operate after reaching the maximum operating temperature (before the temperature gauge needle enters the red section or before the temperature warning light comes on), turn off the ignition, remove the two wires from the thermal switch and connect them together.

2. Turn on the ignition. If the fan now works, then the thermal switch is faulty and must be replaced.

3. If the fan does not work, check the battery voltage on the wires to the thermal switch. No voltage indicates either a faulty wiring or a blown fuse.

4. If the thermal switch and wiring are in good condition, then the fan motor is faulty. The motor can be checked by directly applying (with additional wires) voltage from the battery is applied to it.

Removal

1. Remove the radiator.

2. Remove the front part of the radiator grille.

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3. Unscrew the three fan motor mounting bolts (indicated by arrows), remove it forward from the casing and disconnect the electrical connector.

Installation

Installation is carried out in the reverse order of removal.