Microwave displays E10 and does not start; often associated with built-in models with motorized vents or dampers.

Safety first: Unplug the microwave before inspecting any moving parts.

• Listen for damper movement: On start-up, some Hansa models move an internal damper. Listen for a brief motor sound. If you hear grinding or no sound at all, the damper may be stuck.
• Check installation: Ensure the built-in microwave is not installed too tightly against cabinetry, which can deform the casing and jam internal flaps.
• Avoid forcing doors or vents: Do not attempt to pry open internal flaps from the cavity side; this can damage the mechanism.
• Professional repair: A technician should access the damper assembly, clear any obstructions (e.g., insulation, wiring), test the damper motor and limit switch, and replace the damper motor assembly if defective.

Warning: Operating with a jammed damper can cause overheating and poor ventilation.