A Miele Oven fault codes list includes:

Code F23/F32/F33

These error codes appear on ovens with pyrolysis. Error code F23 means that it couldn't reach the high temperature for the pyrolysis function. That's often due to caked food rests that are in the oven for longer. Remove large food rests first, before you turn on the function again. With error code F32 and F33, there's a problem with the door during the pyrolysis program. Turn the oven off and check if there's anything between the door.

Code F60

If you see this code, there's a problems with the ventilation. Turn the oven off and make sure the ventilation isn't blocked. turn the oven back on and check if the fan spins when it heats up. Doesn't the fan spin? The motor is probably broken or there's something wrong with the electrical wires. Contact a mechanic for this.

Code F44

If you see F44 on the display, there's a technical error. Turn the oven off for half a minute by pulling the connector from the socket or by switching the fuse in the fuse box. After that, turn the oven back on.

Code F54

The error code F54 occurs with oven with a meat thermometer and it indicates that it's broken. Gently pull the thermometer from the oven. The error disappears automatically. Order a new meat thermometer, so the error doesn't come back.

Code F55

The error code F55 means that the oven turns itself off automatically. This happens due to safety reasons when you use the oven for a very long time. For example, when you make multiple casseroles after each other without turning the oven off. Turn the oven back on. Restart the program to continue baking or cooking.