The LED does not light W15A

If the LED fails to light up, you can follow these steps to diagnose the issue.

Start by opening the control panel door and locating component 275F3. Remove the black cover and inspect the fuse (should look in good condition but if you are not sure you can use a multimeter to check it).

If the fuse is broken, it needs to be replaced.

Check the amperage of the old fuse to ensure that you replace it with a suitable one.
After replacing the fuse, if the light on the component 275F3 is still red or if the lamp does not illuminate, disconnect the connector from the roof of the machine before attempting another replacement. Reconnect the connector to the roof and switch on the light to check for any change.
Now, it is important to measure the voltage at the roof connector in order to verify that the issue does not stem from the wiring.
If none of your checks have helped then lamp is faulty and should be replaced. You can order the lamp from the following link: Giesen Coffee Roasters Store