Interior light stays on even when the door is closed, causing temperature to rise.

Safety first: Unplug the unit before adjusting or replacing the door switch.

Steps to fix a light that stays on:

• 1. Confirm symptom: Look through the door gasket gap in a dark room to see if the light remains on when the door is closed.
• 2. Check door alignment: Ensure the door is not sagging and closes squarely against the cabinet. Adjust hinges if necessary.
• 3. Inspect magnet and switch: Locate the door magnet and reed switch. Realign or replace the magnet if it has shifted. Test the reed switch with a multimeter as described for E7.
• 4. Replace faulty switch: Install a new Brandt door reed switch if it does not open/close correctly with the magnet.
• 5. Control board: If the switch and magnet are good but the light remains on, the main control board may be misreading the door status and require replacement.