Bosch 300 Series Use And Care Manual page 46

en-us Troubleshooting
Issue
There are colored
coatings (blue, yel-
low, brown) inside
the appliance or on
stainless steel dish-
ware that are diffi-
cult or impossible to
remove.
There are colored
deposits (yellow, or-
ange, brown) that
are ey to remove in-
side the appliance
(mainly at the bot-
tom).
Plastic parts inside
the appliance are
discolored.
Plastic parts are dis-
colored.
There are remov-
able streaks on
glasses, glassware
with a metallic ap-
pearance and silver-
ware.
46
Cause and troubleshooting
The formation of films is due to metal components
on silver or aluminum dishware.
Clean the appliance.
▶
You can remove coatings with Mechanical
cleaning → Page 35 or a machine cleaning
product. It may not always be possible to com-
pletely remove coatings but they are harmless
to health.
The formation of films is due to ingredients of
food remnants and tap water (limescale), "soap-
like".
Check the setting of the water softening sys-
1.
tem.
→ "Setting the water softening system",
Page 19
Add special salt.
2.
If you are using combined detergents (tabs),
3.
activate the water softening system.
Follow the information on detergents.
Plastic parts inside the appliance may become
discolored over the life of the dishwasher.
Discoloration may come about and will not im-
▶
pair functioning of the appliance.
Dishwashing temperature is too low.
Select a program with a higher dishwashing
▶
temperature.
Dishware has been precleaned too intensively.
Then the sensors choose a lighter cycle. Stub-
born remnants cannot be entirely removed.
Only remove large remnants of food and do not
▶
pre-rinse dishware.
Amount of rinse aid to be dispensed is set too
high.
Set the rinse aid system to a lower setting.
▶
→ "Setting the amount of rinse aid", Page 21
No rinse aid has been added.
Add rinse aid.
▶
→ "Adding rinse aid", Page 21
There is detergent residue in the final rinse. Lid of
detergent dispenser is blocked by dishware and
will not open fully.
Arrange dishware in the upper rack so the tab
1.
collecting tray is not obstructed by dishware.
→ "Loading dishware", Page 25