Fridge Not Cold On Gas

Hi all, I'm back. My dometic 3804 doesn't cool on gas but works fine on ac. I was told the only thing it could be was the chimney. Well, I removed the fridge and the baffle is indeed in there, and the chimney is clear, with very light surface rust. The baffle has light rust also, which was expected, but solid, idk if it should even be replaced, anyone know a good source? So where else should I check, I thought it was the board, but was told no.. Any other ideas? Btw pilot is fine and stays lit, Wic pressure is good, burner and orifice clean.