Match the symptom, then work through the safe checks.
1. What best matches what you observe?
2. Complete only the checks that are safe for you.
Show stop conditions
- The display is E31 / F31 and internal drying-system access would be required
- The display is E31-00 / E3100 or water is present in the base area
- There is a burning smell, breaker trip, leak, or exposed electrical damage
Likely causes
- A fault is present in the dishwasher drying system on a model that supports E31 / F31
- The dishwasher may stop heating normally and leave dishes wet
- The displayed code may actually be E31-00 / E3100, which belongs to a different water-protection fault family
- Model, market, and generation differences require the full E-Nr before parts or service procedures are chosen
Quick checks, in order
Photograph the complete code before resetting
Confirm whether the display says E31, F31, E31-00, or E3100. The suffix changes the diagnosis.
Record the full Bosch E-Nr
Use the rating label on the door edge and match the complete model and suffix to Bosch support.
Treat E31 / F31 as a service-level drying fault
Do not open the drying module, heater, wiring, or Zeolith system. Bosch lists E31 / F31 on supported dishwasher families and internal drying-system work is not a user repair.
If the code is E31-00 / E3100, switch paths
That code is associated with activated water protection on current Bosch guidance. Shut off the water supply and use Bosch service rather than following an E31 drying-system path.
Which exact E31-format code is on the display?
Use the model-specific Bosch support path for the drying-system fault and arrange service.
Do not treat this as the same code. Current Bosch guidance associates E3100 / E31-00 with activated water protection.
Shut off the water supply and stop troubleshooting until the exact code and leak-protection state are confirmed.
Stop and get qualified help when
- The display is E31 / F31 and internal drying-system access would be required
- The display is E31-00 / E3100 or water is present in the base area
- There is a burning smell, breaker trip, leak, or exposed electrical damage
Official support and model manuals
Use the full model number from the rating label. The manufacturer manual is the deciding reference when codes differ by region or product family.
Frequently asked questions
What does E31 mean on a Bosch dishwasher?
On supported Bosch dishwasher families in regions where E31 / F31 is listed, it is associated with the drying system. Confirm the full E-Nr because Bosch code sets differ by market and generation.
Is Bosch E31 the same as E31-00 or E3100?
No. Keep the exact display format. Current Bosch guidance uses E3100 / E31-00 for an activated water-protection condition, so it should not be diagnosed as the same fault as E31 / F31.
Can I repair Bosch E31 myself?
The drying-system path involves internal components and is not a normal user-level repair. Record the E-Nr and exact display, then use Bosch service guidance.