Oven takes unusually long to cool down, cooling fan runs for a very long time after cooking

Safety first: Ensure adequate ventilation around the oven to prevent overheating of surrounding cabinetry.

• Check vents: Make sure front and top vents are not obstructed by trim or objects.
• Inspect cooling fan: Verify that the fan is running at full speed and not obstructed by dust or debris. Clean or replace as needed.
• Installation check: Confirm that the oven is installed according to De Dietrich's ventilation specifications.
• Monitor behavior: Some extended fan operation is normal after high-temperature use, but excessive times may indicate insulation or sensor issues requiring professional assessment.