Written by Caitlin
Edited on
6 October 2025
·
10:42
How do you solve error codes on a Bosch or Siemens microwave?
An error code appears on your Bosch or Siemens microwave. That's annoying, because that's not what you want. On this page, you can find the meaning of common Bosch and Siemens microwave error codes, and we'll tell you how to solve them.
Siemens and Bosch error codes
In this article, we'll tell how you can solve the most common errors yourself.
- E2: automatic safety switch-off
- E11: moisture in control panel
- E3: error door opening system
- E17: fast preheating failed
E2: automatic safety switch-off
If E2 appears on the display, the automatic safety switch-off turned on. Turn the dial or press a random key and the error code disappears automatically.
E11: moisture in the control panel
The error code E11 means that there's moisture in the control panel. For example, because of steam after opening the door after baking. Do you see moisture on the outside? Dry this with a cloth. If there's moisture on the inside, you have to let it dry first before you use the microwave again.
E3: error door opening system
With the error code E3, there's something wrong with the door opening system. Turn off the microwave and turn it on after 10 seconds. If the error disappears, it was a one-time problem. Does the code appear again? Contact the manufacturer.
E17: fast preheating failed
When you see the error code E17 on the display, fast preheating failed. This can happen because of several things. Turn off the microwave and let it cool of completely first. Also pull the plug from the socket or remove the power from the socket. Turn on the microwave again after that. Does the error code appear again? This means that it's an internal problem and you have to contact the manufacturer.
Still get an error code?
You tried everything, but the error code is still showing. Pulling the plug from the socket is the first solution always. This doesn't work and the error code is still there? Don't worry. Did you buy a microwave from Coolblue and does it have warranty? Contact our customer service. If you bought your microwave somewhere else or the warranty expired, please contact your seller or Bosch and Siemens themselves.
Article by Caitlin
Microwave Expert.