Cordless vacuum display shows E7 and suction is disabled, brush may still rotate

Safety first: Remove the battery before adjusting the dust container or filter.

• Remove and reinstall dust container: Take off the dust container completely and inspect the mounting rails and latch. Refit it firmly until you hear a click.
• Check filter installation: Ensure the main filter (HEPA or cartridge) is installed in the correct orientation and fully seated. Some Kärcher models have a sensor that disables suction if the filter is missing.
• Inspect latch and tabs: Look for cracked or worn plastic tabs on the container that actuate an internal switch. If broken, the container may not press the switch far enough.
• Test switch (if accessible): With the battery removed and housing open (if you are comfortable), locate the small microswitch that detects the container/filter. Gently press it with a non‑metallic tool and see if the error clears when reassembled. Do not bypass the switch permanently.
• Replace damaged parts: If the container or filter frame is cracked, replace with original Kärcher parts. If the switch is faulty, the switch or main PCB assembly may need replacement by a technician.