E9 is displayed and the cooker will not enter pressure mode, even though it heats slightly.

Safety first: Unplug the cooker before inspecting the lid sensor.

• Check lid lock status: Close the lid firmly and ensure the handle is fully in the lock position. If the lid feels loose, inspect the hinge and locking ring for damage.
• Locate lid sensor: Many OBH Nordica models use a small magnetic or mechanical switch near the hinge. Inspect for broken plastic, missing magnet, or misalignment.
• Clean around sensor: Remove any grease or food residue that might prevent the sensor from engaging when the lid is closed.
• Test operation: With the unit unplugged, manually actuate the sensor (if mechanical) and listen for a click. If there is no click or it feels stuck, the sensor assembly may need replacement.
• Reassemble and test: Plug in and try a non-pressure program first. If E9 only appears on pressure programs, the lid sensor is not confirming a safe lock.

Warning: Do not attempt to defeat the lid sensor; it is essential for safe pressure operation.