My Philips AquaTrio Pro Vacuum Cleaner shows a red light during flushing

1. Open the mopping nozzle lid, remove the mopping brush cover and check for any objects blocking the brushes
2. Remove any objects
3. Place back the mopping brush cover and close the mopping nozzle lid

You can continue the flushing session. If this happens every time during flushing, try to make sure the amount of water is not exceeding the maximum level indicated on the flushing tray. Only 300ml of water is needed for a flushing session.