1. Turned power off.
2. Removed 2 screws holding plastid plate which connected electrical wire from mullion to door (requires Torq-tip screwdriver).
3. Unplugged wire plug behind the plate.
4. Lifted up old mullion from 2 slots holding it in place to remove it from door.
5. Inserted new mullion into slots on door.
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6. Connected electrical wire to plug inside door.
7. Screwed 2 screws to reattached plastic plate to door.
8. Turned power back on.
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