E5 error appears when trying to start a pressure program; cooker does not build pressure.

Safety first: Ensure the cooker is unplugged and fully depressurized before working on the lid or pressure components.

• Clean pressure sensor port: On many OBH Nordica multicookers, the pressure sensor is connected to a small metal port or channel near the steam release valve. Remove the inner lid and carefully clean any food residue from the port using a toothpick or soft brush. Do not enlarge the hole.
• Inspect silicone hose (if present): Some models use a short silicone tube between the lid and the pressure sensor. Check that it is not cracked, blocked, or disconnected. Replace if hardened or damaged.
• Check sensor connector: Remove the top or bottom cover (depending on model) to access the pressure sensor module. Ensure the multi-pin connector is firmly seated on the sensor and the main PCB.
• Test with water only: Reassemble, add at least 500 ml of water, and run a pressure program. Listen for the unit attempting to heat and seal. If E5 returns without pressure build-up, the pressure sensor module may need replacement.

Warning: Never block or modify the pressure relief paths; this can create an explosion hazard.