The data is on the type plate, which you can find as shown.
Error code F40 indicates a critical electronics error. This can have various causes, which are often related to the electronics of the washing machine.

Miele
F40

40

Error code F40 is what’s known as an “electronics error.” That means the electronics in your machine are very likely faulty. With a repair or a refurbished electronics unit from us, the error will be fixed for good and won’t come back.
Please enter your device’s model number in the appropriate field to find the right products to fix your error.
The data is on the type plate, which you can find as shown.
No problem. Send us the most important details about your appliance and the fault. Our team will review your information and help you find the right solution.