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HEATER BLOWER RESISTOR REPAIR

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

 

AUDI A4 1.9TDI - HEATER BLOWER RESISTOR REMOVAL INSTRUCTIONS

Instructions supplied by a Valued Customer - Many Thanks

   
AUDI A4 HEATER BLOWER RESISTOR REPAIR

1. Remove plastic cover at the end of dashboard to expose of Glove Box compartment.

 

 

AUDI A4 HEATER BLOWER RESISTOR REPAIR

2. Remove the glovebox which is secured by 5 x 8mm bolts.  Take care not to damage the wiring for the glovebox light on the right side of the glovebox.

AUDI A4 HEATER BLOWER RESISTOR REPAIR

3. Disconnect the wiring for the glovebox light.

 

 

AUDI A4 HEATER BLOWER RESISTOR REPAIR
4. Remove glovebox noting how it is clipped in place at the bottom edge
AUDI A4 HEATER BLOWER RESISTOR REPAIR

5. Disconnect the 2 plugs from the resistor pack

AUDI A4 HEATER BLOWER RESISTOR REPAIR
6. Pull down the plastic strip at the front edge of the fan to allow the front edge of the resistor pack to be lifted and then withdrawn.
AUDI A4 HEATER BLOWER RESISTOR REPAIR

7. Put the resistor block in a jiffy bag (or similar) with a copy of your Paypal / ebay receipt and then post to us for repair.

 

 

   
   

IMPORTANT NOTICE – PLEASE READ

The resistor block 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.