My upright freezer is freezing ice on the top 2 shelves and they freeze to the door so bad that if broke my rail on door when I opened it from being frozen to shelf. The seal seems to be ok and have no idea how to fix it

Hello, The unit is freezeing because you are having a fault when the unit is trying to go into its defrost cycle. Click this link http://c.searspartsdirect.com/lis_png/PLDM/R0303508-00003.png you would have to perform a continuity test on parts 20 and 14 using a multimeter to see which of these two is at fault. Usually it is part 20 which is the defrost thermostat that causes this issue in the unit. If you do test both of these parts and both do have continuity message me back for further diagnosis. Thanks I await your reply and please also remember when our chat has fully concluded to rank how this opinion has helped in your appliance situation it allows me to continue helping others in similar situations in the future. Thanks
Rick