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Rattling noise?
Possible reason - On old appliances with
ITW electronics:
The capacitors in the main electronic board are
loosing capacity.
Change the main board (follow the description
in the
Service Bulletin 4812 711 40179
, for old
appliances)
Ventilation noise?
Check what fan is responsible of noise (using
the BI test and opening the fridge door - in this
case the evaporator fan will stop).
Compressor fan:
Check if something is in
contact with the blades. If
all OK, replace the fan.
Evaporator fan:
Check if the motor fan
assembly is ok. Be sure
that the blade is
completely inserted in the
motor shaft.
Check also if noise could
be generated by the
vibration transmission
due to some contacts
between shelf and
freezer cover ribs.
Follow the instruction in
Service Bulletin 4812 711
40317
.
Troubleshooting & Diagnostic:
Noise from the appliance.