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HEATER BLOWER MOTOR FAN CONTROL UNIT

Heater blower fan only works on high / Heater blower fan only works on 4

 

CITROEN XSARA HEATER BLOWER MOTOR FAN CONTROL UNIT

 
Tools: 6mm socket/spanner, crosshead screwdriver, small hole locator and a flat head screwdriver.
 
Citroen Xsara Heater Blower Motor Control Unit
 

1.     Remove soft facia trim cover (flat head screwdriver) below glovebox to access motor unit.

 

2.     Disconnect wires going into the unit.

 

3.     Locate and remove 3 hex head self tapping screws. 6mm. socket/spanner.

 

4.     Remove the unit to gain easy access to remove the resistor.

 

5.     At the opposite end from the fan, unscrew the crosshead sef tapper screw. Put an alignment mark on the casing to help when reassembling the unit.

 

6.     Gently ease back the casing, this allows access to one of two screws securing the resistor to the unit.

 

7.     Unscrew both screws and withdraw the resistor, taking care not to damage the blade connectors.

 

8.     Installation is the reverse of the above procedure. Take care when re-seating the resistor that the blades are located properly. Also the crosshead screw hole is aligned using a small probe to locate the screw hole. 

 

9.     But before installing the unit, now would be a good time to try the unit out by reconnecting the wires and operating the fan switch.

 

10.   If alls well, reassemble.
 

IMPORTANT NOTICE – PLEASE READ

The control unit can fail for no apparent reason but it may also fail due to excessive load by the blower motor.
It is usually either because of a blocked pollen /air filter or because rain water has got into the blower motor.
The danger is that if the motor has had water in it then it could be partially seized which in turn may cause the repaired unit to fail prematurely.


IMPORTANT STEPS TO CHECK FIRST BEFORE FITTING THE REPAIRED UNIT

1. Check the condition of the pollen / air filter - Not all cars have them but it is worth checking for a pollen / air filter on the air inlet to the motor. On most cars the air inlet is located under the bonnet directly by the windscreen area.

2. Check for any blocked rain water drain points - Make sure that rain water is not collecting around the air inlet to the blower motor.

3. Check that the blower motor is not seized - If you can get your hand into the motor then check it turns freely. For safety it is important the key is out of the ignition before putting your hand into the motor.