These are the symptoms of a broken hinge:-
A Dometic 8 Series fridge looks like this:-
If the door is removed, the problem can be seen here - this is the top hinge, the moulded in piece is broken:-
This is an unbroken bottom hinge for comparison:-
By paring away some of the original plastic carefully with a sharp wood chisel or knife, our insert can be added to give a much stronger mounting for the hinge pin. The picture below shows the insert in light grey just so you can see it - you’ll actually be supplied with black ones. The insert will usually stay in place as an interference fit.
You’ll actually receive a pair of inserts in black like the below, shown next to a penny for scale, so you can repair / reinforce both the top and bottom hinges:-
 
                         
         
             
             
             
            