Subject:

Noise \ Vibration from heater

 

Vehicles affected:

Astra-G

 

Condition:

The Warranty Material Return Centre is receiving a number of heater blowers, that have been returned for noise \ vibration problems, where no fault can be found.

 

Remedy:

It is believed that some of the heater blowers may have had foreign material in the blower unit, which subsequently fell out during transportation. Other blowers have still had foreign material in situ when tested.

Find overleaf a check-list for blower noise / vibration.

 

 

The information in this bulletin should not be interpreted as the basis for claims unless so designated.

 

All component(s) fitted under warranty could be requested for return to the Warranty Material Return Centre, if after examination the components are found to be No Fault Found then  the component(s) could be returned and your account debited accordingly.

 

Checking procedure for noise and/or vibration:

 

1)   Try to locate the noise/vibration source

 

Blower speed	1		2		3		4
Vibration	Y	N	Y	N	Y	N	Y	N
Touch the steering
Touch the dashboard
Touch the glove box
Remove the glove box and touch the module
Touch the motor case

 

2)   Make sure that the module is correctly fixed

 

Check sequence:

       1)    Make sure that all the screws are tightened:           -Motor fixing screws                     …..

                                                                                               -Module assembly screws             …..

                                                                                               -Module fixation screws               …..

       2)    If the screws are not tightened then do them up and re-check                                     …..

       3)    The module still vibrates or makes noise after operation?                                            Y/N

 

3)   Internal control of blower

 

Check sequence:

       1)    Remove the blower from the module and keep it in its operational position

       2)    Survey the blower case and wheel for such items as:

                                                                                                                           If YES then corrective action:

                   Foreign body in motor                                                 Y/N            Remove and re-assemble

                   Foreign body in wheel                                                 Y/N            Remove and re-assemble

               Broken wheel                                                              Y/N            Replace blower

                   Cracked wheel                                                             Y/N            Replace blower

                   Axial play on shaft                                                       Y/N            Replace blower

                   Sealer in contact with wheel                                        Y/N            Remove and re-assemble

                   Wheel hard to turn                                                       Y/N            Replace blower

                   Noise when rotated by hand                                        Y/N            Replace blower