Sybil L Westminster , CA January 01, 2021 Appliance: General Electric Refrigerator GNS23GMHBFES Ge Refrigerator Gns23gmhbfes: Broken door part. How to replace Refrigerator Door Mullion Assembly. Replaced part off door. Unscrewed the old one and screwed on the new one. It was very easy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes