Noises; Noises When Drum Rotating; Noises During The Spin Cycle; Noises When Water Runs In - Bosch WAT28400 Repair Instructions

Fault diagnosis
4.4

Noises

Fault
Noises
Noises during the draining process.

Noises when drum rotating

Noise when drum rotating

Noises during the spin cycle.

Noises when water runs in.

2017-05-22 / DIS 113_58300000186503_ara_en_c
Possible cause
Air in the pump
Switching pump during start-up
Foreign objects in the pump
Structural design of the friction damper
Starting current of the motor
Carbon brushes worn
High speed of motor
Deceleration of the motor
Screws on the weight loose
Weight broken
Deformation of the belt if the appliance is
not used.
Foreign objects under the drum
Components are resting against the hous-
ing (optional)
Appliance vibrates/jumps/wanders
Solenoid valve of the water inlet is opening
or closing
Water flow through the solenoid valve
Copyright by BSH Hausgeräte GmbH
Troubleshooting
► Normal noise
► Shaking function of the pump anti-clockwise/clockwise start-up
► See instruction manual, "Cleaning the pump"
► A load which occurs during operation may cause a noise in the friction damper.
► Advise customer:
Normal operating noise, not a fault.
► On AC / DC motors check the rotor for damage.
► Replace carbon brushes.
► Normal running noise when motor accelerates
► When starting, the motor draws a very high current. The high current generates
a powerful magnetic field. The laminated core, which forms the core of the motor
winding, oscillates under the influence of the magnetic field. A droning noise is
generated.
► Advise customer:
Normal operating noise, not a fault.
► Tighten screws; replace screws if required.
► Replace weight.
► If the appliance is not used for a prolonged period, the belt is deformed by the
strong curvature of the pulley on the motor shaft. The deformed belt causes noises
when the drum rotates, particularly during the spin cycle. During normal operation
of the appliance the deformation regresses
► Advise customer:
Normal operating noise, not a fault.
► Clean outer tub and waste water routes.
► (Page 85)
► Check that appliance is positioned correctly (Page 54)
► Have the height-adjustable feet been locked?
► Have the transportation protection devices been removed?
► Normal noises not a fault
► Normal noises not a fault
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