I have a goodman gmp 1004 gas furnace the old board has to be replaced pt#(18099-6)with a b18099-13 the wiring is not the same is there any thing that I showld look not to do before I attempt to install the new board I did mark every single wire when I took the old board
Any help is greatly appreciated
Lee

Just be careful and don`t get your fingers on the printed circuits on the back, handle with TLC
Salt or oil from your skin can cut down on the life of the board