Problem solving guide
139
Problem
Cause and remedy
Fault 438
The door seal sticks.
Clean the door seal.
Heavy objects in front of the cleaning machine can impede
the automatic opening of the door by the Comfort door
lock.
Do not place (heavy) objects in front of the door of the
cleaning machine.
The Comfort door lock is blocked.
Try to open the door carefully (without using force) by
pulling on the door handle.
If the door is still blocked:
Open the door using the emergency release.
Close the door and try to open it again using the
button.
If it is still blocked:
Contact the Miele Customer Service Department.
Fault 440
The float switch in the base of the machine has not been
activated. The switch might be blocked.
Remove the filter combination.
Check the float switch to make sure it moves freely. The
float switch is located in the base of the machine behind
the spray arm.
Fault 460-462
A programme was interrupted due to the spray arm speed
dropping below the set value.
- Items are obstructing the machine or basket spray arms.
Arrange the load so that the spray arms can turn easily
and start the programme again.
- Wash pressure is too low due to a heavy build-up of
foam.
Follow the instructions regarding foam build-up in
“Chemical processes and technology”.
Fault 492, 504
A programme has been cancelled because there is not
enough spray pressure. The filters in the wash cabinet may
be blocked.
Danger of injury from glass shards, needles, etc.
retained in the filters.
Check and clean the filters in the wash cabinet (see
“Maintenance/Cleaning the filters in the wash cabinet”).
