There are 3 (or 2 i forgot tbh) objects that change their text after you found the fridge list. The 3 lines all describe the same 4 digit number for the padlock so if you can't figure out 1 hint another might work for you.
I put hints for all the major puzzles in this doc (no solutions, only hints) so this might help you https://docs.google.com/document/d/1VV_nqNPWsTyXiJ506y8Alw5LdpAtsP7ZrR5NZPg99TE/...
thanks for playing (=