Oven displays E7 and may not start; often related to door status or safety interlocks.

Safety first: Disconnect power at the breaker before removing any panels or working near wiring.

Step-by-step checks:

• Check door closure: Ensure the door closes fully and evenly. Look for bent hinges or obstructions on the gasket.
• Inspect latch area: Locate the door switch or latch sensor (usually near the top front frame). Check that the actuator engages the switch when the door closes.
• Test switch: With power off, remove the switch and test continuity with a multimeter while pressing and releasing the actuator. Replace if readings are not as specified (typically closed when door is shut).
• Check wiring: Inspect the harness from the switch to the control board for breaks or loose connectors.

When to replace parts: Replace the door switch / latch sensor if faulty. If the switch and wiring are good, the control board may be misreading the door status.