What to check, in order
- Stop using the washer
Bosch advises not to run it with this code.
- Book a repair
The sensor needs testing and, most likely, replacing.
When to call an engineer
Now. Bosch says to contact customer service.
A repair visit will usually check the pressure sensor and the thin air tube that connects it to the drum.
Before you book
- Note the model and serial number. They're on a label inside the door, around the door frame or on the back.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
Quick answers
What does the Bosch E26 error code mean?
The pressure sensor that measures the water level has a fault. Siemens also lists E27 and F27 for the same sensor.
Can I fix Bosch E26 myself?
Engineer only (nothing to try at home). Start with: stop using the washer; book a repair. Now. Bosch says to contact customer service.
Is Bosch E26 worth repairing?
Worth fixing. The sensor is inexpensive next to a new machine, so the cost is mostly labour.
Checked against
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.