Welcome! Here are the website rules, as well as some tips for using this forum.
First start up. Furnace has 5 propane burners. On start up, the burners on each side of glow igniter with start burning. Flame won't transfer to other 3, then shuts down, no flame to flame sensor. I can light the other 3 burners with bbq flame stick on start up, then furnace will work. Checked gas pressure before valve, have 8 oz. of pressure. Burners are horizontal, and up draft.