First thing to check would be the burner. There are plenty of how-to’s on the web on how to do this. Given that it ran out of propane, perhaps some crud got in there. Cleaning the burner is good general maintenance anyway.
Have you been reasonably level? Those refrigerators need to be reasonably level to operate properly.
Do you have an AC (110 volt) burner as well? If so, see if it works on 110. If it does, than that points to the propane burner. If not, it might be some other problem.
Good luck,
Joel
