The warning is usually related to the electronics or the interface. Here you have the real cause and how to act without making the fault worse.

The board is protected against overheating. What to check, how to reset it, and when it’s a good idea to ask for technical help.
The board goes into thermal protection: check what may be behind it and when it’s time to request assistance.
The board is protected by excessive heat. What to check, how to reset it, and in what cases simply waiting is no longer enough.

Error code E09 usually indicates an electrical fault in the drying cycle and requires technical diagnosis before running more cycles.

The code indicates a temperature fault in the filter area. This is how it is identified and corrected without replacing parts blindly.

The fault is usually in the drainage: filter, pipes, and pump are the first things worth checking.

The warning indicates overheating of the motor and the thermal fuse. These are the useful checks to perform before repairing.

The CA notice indicates a fault in the board and requires checking connections, components, and technical service.

The warning points to the drainage or the pump’s electronics. That is how it is interpreted, and what to check before repairing.

The warning points to the level control and to pressure faults, foam, or water retained in the circuit.

The warning indicates pressure or foam in the circuit. That is how it is interpreted, what to check, and when it is advisable to stop.