0 0 There is a lot of ice build up on the back wall of my freezer. What type of issue would cause this. Also ive been seeing “4E” pop up on the screen. Model Number RF263TEAESG/AA Refrigerator Samsung Share Facebook Twitter Google+ Tumblr LinkedIn Mail Hall Refrigeration asked 4 weeks ago Answers (1) Filter Sort by: Newest First Oldest FirstMost VotesRecently Active Post Answer Keyword Match all Match any 0 0 The ice buildup along with the 4E error code indicates an issue with the defrost sensor. I would recommend starting by replacing that part. AV Repair Help answered 4 weeks ago You must login to reply Showing 1 result Your Answer Please login first to submit.