Hansa oven overheats and burns food even at low settings; thermostat knob position does not match actual temperature.

Safety first: Disconnect power and allow the oven to cool before inspection.

• Verify temperature: Place an oven thermometer inside and compare actual temperature to the set value. If the oven overshoots significantly, suspect regulation issues.
• Mechanical thermostat models: Test the thermostat contacts with a multimeter while turning the knob. If contacts remain closed regardless of setting, replace the thermostat.
• Electronic models: Test the NTC sensor resistance and replace if out of specification. If the sensor is good, the control board may be misregulating and require replacement.
• Do not continue using: Avoid using an oven that severely overheats, as it can be a fire hazard.

When to call a technician: If you cannot identify whether the thermostat or control board is at fault, seek professional diagnosis.