Cordless vacuum shows E7 and does not respond to trigger; sometimes accompanied by all LEDs flashing.

Safety first: Remove the battery pack and ensure the vacuum is completely powered down before inspection.

• Visual inspection: Check the exterior for signs of liquid spills or impact damage. If the unit was exposed to water, do not attempt to power it on again.
• Check connectors (if accessible): On some Rowenta cordless models, you can remove the dust bin and a small cover to access wiring connectors. Ensure connectors are fully seated and not corroded.
• Battery reseat: Remove and reinstall the battery several times to ensure good contact and to reset the electronics.
• Drying after minor moisture: If you suspect light moisture (not full immersion), remove the battery and leave the vacuum in a warm, dry place for 48 hours before retrying. Do not use heat guns or hair dryers.
• Do not open sealed electronics: The main PCB and motor driver are not user‑serviceable. Opening the housing can damage seals and void warranty.
• Professional repair: Persistent E7 indicates a control board or communication failure. Contact an authorized Rowenta service center for PCB diagnosis and replacement.