Oven shows F2 and may shut down heating unexpectedly.

Safety first: Disconnect mains power and allow the oven to cool completely. Overtemperature conditions can be hazardous.

Steps to diagnose:

• Check ventilation: Confirm that the oven has adequate clearance and that cooling vents are not obstructed by cabinetry or items stored around the oven.
• Inspect cooling fan: Ensure the cooling fan operates during high-temperature use. If not, test and replace the cooling fan motor as needed.
• Locate high-limit thermostat: Many OBH Nordica ovens have a manual-reset or non-resettable high-limit thermostat mounted on the top or rear of the cavity. Inspect it for signs of overheating.
• Test thermostat: With power off, disconnect the thermostat and check for continuity. An open circuit on a non-resettable type indicates it has tripped permanently and must be replaced.
• Check control relays: Inspect the main PCB for a relay stuck closed (contacts welded). If the oven continues heating when it should be off, replace the control board.
• Replace faulty parts: Install a new OBH Nordica-compatible high-limit thermostat if required, and ensure proper mounting with good thermal contact.
• Test: Reassemble, restore power, and run the oven at a moderate temperature to confirm stable operation without F2.