Help with pc board on basement a/c on 96 Winnebago vectra

It is a very rare instance where a resister goes bad. Some other component has probably failed and caused excessive current to overheat the resisters. You could chase this problem for a long time by replacing parts but without a schematic and an understanding of the PC board's operation, it all may be a waste of time. Buy the replacement board and move on to other things that are more important.