The room where the tumble dryer is located is too warm.
Ventilate the room thoroughly.
The drying process goes on too long or even switches off.
Ventilate the room thoroughly.
Clean the lint filters and the toe-kick filter.
Remove visible lint from the heat exchanger.
Untangle the laundry and remove a few items.
Start a program.
Move any objects, such as a laundry basket, away from the dryer.
Spin using a higher spin speed in the washing machine.
Open any zippers next time.
If the problem recurs, dry these items using the Time Dry program.