Plug it back in and restart to clear temporary software glitches. JustAnswer Perform Descaling
Use a Krups descaling sachet or solution to dissolve mineral deposits. If the machine is completely blocked, you may need to manually clean the water inlet or check valves. krups error code 09
If you haven't descaled your machine recently, mineral buildup may be the cause. While the machine is off, check the water tank and intake. If the machine allows you to enter the maintenance menu despite the error, run a descaling cycle immediately using a Krups-approved citric acid solution. 3. Check Environmental Temperature Plug it back in and restart to clear