If you take to a Norcold service center no problem. You maybe could change yourself.
After looking at mine with a slite tear on upper seal large door the gasket is wedged around black frame of door that would have to be taken off. Two screws at pivot point of door maybe starting point.
If you look on how to install
decorative panels and picture diagrams of what is removed to do this the panels around door also holds the gasket alot more work than the Domedic refers gasket replacements I have done.

You may only need the one gasket replacement. I'm going to get some rubber cement
sealent for my tear.
Your seal maybe still ok, JoeT found
this wrong with his refer a simple thermister on his cooling fins that was defective.