I am looking for the diagram or schematic for Carrier Furnace Model GB1AA. I need to get I believe, is the limit switch that is at the top attached to where it vents out, also the limit swith below the burners. They both have reset buttons on them, but there are several different limit switches and not sure which I need. If I had the diagram for the parts diagram or schematic, I know it would list which switch I need to purchase.