I wonder if there a list of codes for this puzzle in the normal category

I'm not entirely sure what you mean, but maybe this picture I made might help you?

The writing on the oven door is always random, with the only consistent thing being that it should always have a 7 in the code. So a list of every code possible would theoretically be very long. The numbers of the gurneys however will never change. So you can use this reference to help you work out the puzzle solution easier

I Play Silent Hill 3 easy normal I Dont Know the code