Vacuum display shows E06, unit may not start or runs erratically, speed control not responding correctly

Safety first: Remove the battery pack before any inspection. Do not open sealed electronic modules if you are not qualified.

• Power reset: Remove the battery for at least 5 minutes to allow the electronics to discharge. Reinsert the battery and test again.
• Inspect for moisture: Check the handle and control area for signs of liquid spills or condensation. If the vacuum was used to pick up liquids (not allowed), internal damage is likely.
• Check external connectors: Inspect the battery contacts and any visible plug connections (e.g., between handle and motor unit) for corrosion or bent pins. Clean gently with a dry cloth.
• Limit DIY disassembly: Some Bosch cordless models allow removal of the motor unit from the handle. If accessible, check that internal connectors are firmly seated, but avoid disturbing wiring looms excessively.
• If E06 persists: The main control PCB or internal communication bus is likely defective. Replacement of the handle/control module or main electronics is required and should be done by a Bosch service center.