I thought of a Heter, but it only helps once you’ve accidentally opened the door. You need two people. One person stands with their hand in the way of the door were it closing. Then the person who has been holding the door open closes it. It cannot close, because the other person’s hand is in the way. Then, after all momentum from the closer has been expended, the stopper merely removes his hand. This is not even a Grama. He’s not even doing anything, just getting a blocker out of the way (because almost all refrigerators are designed to close on their own as long as they are only slightly open.
I haven’t presented this to Poskim yet, but I think it works. And no, don’t ask me about removing the dam to drown someone. It’s not the same.