Microwave shows E9 and will not start; interior light may stay on as if the door is open.

Safety: Unplug the microwave before inspection.

Door and latch check:

• Open and close the door slowly. Listen for distinct clicks from the door switches. If you do not hear them, the latch may not be engaging.
• Inspect the plastic latch hooks on the door for cracks or missing pieces.
• Check the door alignment; if the door sags or rubs, hinges may be bent.

Internal switch inspection:

• Remove the outer cabinet and locate the door switch assembly.
• Inspect the monitor switch and interlock switches for signs of overheating or melting.
• Test each switch with a multimeter for proper open/closed operation as the door is opened and closed.

Corrective actions:

• Replace any broken door latch hooks or the entire door assembly if necessary.
• Replace faulty door switches with Magic Chef-specified replacements.
• If all mechanical parts test good but E9 persists, the control board's door sensing circuit may be defective and require replacement.

Final step: After repair, verify that the interior light turns off when the door is closed and that the unit starts without showing E9.