This is the most common reason for the error. The NTC sensor itself might be broken and need replacement. Alternatively, the thin wires connecting the sensor to the main control board might have come loose or suffered a poor connection. One technician described an instance where the connectors for the sensor had completely cracked.
If cleaning does not work, the internal spring or diaphragm of the valve may be permanently damaged.
Sometimes, minor digital glitches in the control board mimic hardware failures. Turn off the machine using the power button. Unplug the power cord completely from the wall outlet.
This is the most common cause. You will need to remove the outer casing of the machine to access the interior.
Specifically for your model (e.g., EA81, EA82).
If you’ve done all the above and still see Krups Error Code 09, perform the “final test”:
Before you take your machine apart or send it to a service center, try these sequential troubleshooting steps. Step 1: The Hard Reset
Lift the water tank out, empty it, and check the valve at the bottom for any stuck debris.
In the majority of documented cases, this error points to a failure in the or a blockage in the internal water circuit that the machine cannot resolve automatically.
