krups Coffee Machine all lights flashing

If multiple lights suddenly begin flashing, start with a full restart. Switch the machine off, unplug it from the mains and leave it disconnected for at least one minute before reconnecting and switching it back on. Krups troubleshooting guidance uses this procedure when the machine detects an operating fault.

On applicable automatic models, remove the water tank and temporarily remove the Claris water filter cartridge before performing the restart. Refill and correctly refit the water tank, then restart the machine. This helps rule out restricted water flow through the filter as part of the fault check.

Remove the water tank, fill it with fresh water and reinstall it firmly. Check that it sits completely in position. If the machine cannot establish the expected water supply, warning lights can appear and normal operation may be interrupted.

Remove the drip tray and coffee grounds container, empty and clean them, then reinstall them carefully. Make sure each component is fully seated. Don't rush this process—some machines need the containers to remain removed long enough to register that they have been emptied.

Not every combination of flashing lights indicates the same problem. Some Krups machines use individual or combined LEDs for maintenance, water, grounds-container and operating warnings. Take a photo of the control panel before restarting the machine so you have a record of exactly which lights were flashing and whether any were permanently illuminated.

If all the lights immediately begin flashing again after the water supply, containers and restart procedure have been checked, the machine may have detected a fault that requires further diagnosis. Krups guidance advises against dismantling the appliance when a malfunction persists. At this point, record the model number and light pattern before arranging further investigation.