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Source-backed error-code guide

Reviewed

Bosch Microwave E + number / E-xx Error Code

For an unlisted Bosch E-number display, preserve the exact code first. Bosch directs owners to disconnect power and contact Bosch support or service if the error continues. The generic E display is not a safe basis for guessing a failed part or opening a microwave.

Applies to Bosch oven/microwave or built-in microwave showing an E followed by a number that is not separately decoded in this guide library

What the appliance detected

Detected condition

Bosch identifies an E followed by a number as a malfunction or fault/error indication.

What may contribute

Possible causes

  • The appliance has detected a model-specific malfunction represented by the exact E-number shown.
  • The condition may involve controls, sensing, communication, power electronics, or another subsystem depending on the model and exact code.
  • A temporary control fault may clear after a documented reset, but a recurring code requires model-specific diagnosis.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Capture the exact E-number

    • Photograph the complete code, including every digit, dash, space, and any beeping behavior.
    • Write down the Bosch model or E-Nr and use the official owner manual or Bosch support for that exact model.

  2. Stop use and disconnect power if safe

    • Cancel cooking and leave the microwave off. If Bosch documentation for the exact model allows a reset and there is no immediate hazard, disconnect power at the normal breaker or fuse control without opening the appliance.
    • If there is smoke, arcing, burning odor, visible damage, water intrusion, or a breaker that trips again, leave power off and do not attempt another reset.

  3. Use Bosch support for the exact code

    • Bosch directs owners with a continuing E-number malfunction to Bosch Customer Support or service.
    • Provide the exact code and E-Nr so the technician can use the correct model-specific service information.

Actions not recommended

  • Do not remove the outer cabinet, control panel, waveguide cover, trim that exposes service areas, or any internal access panel.
  • Do not touch, discharge, or test the high-voltage capacitor, transformer, inverter, magnetron, internal fuse, relay, sensor, wiring, or control board. Dangerous voltage can remain after the microwave is disconnected.
  • Do not bypass, bridge, tape, adjust, or defeat door-interlock switches or operate the microwave with a damaged or misaligned door.
  • Do not perform live-voltage, continuity, resistance, or capacitor-discharge procedures as a homeowner troubleshooting step.
  • Do not keep resetting a microwave that repeatedly returns the same fault code.

When to stop and request service

  • The E-number remains or returns after any single model-authorized reset.
  • The exact E-number is not explained in the owner manual or Bosch public support information.
  • There is smoke, burning odor, arcing, visible damage, water intrusion, abnormal heating, or repeated breaker tripping.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: September 24, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by Bosch.

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