I can't imagine flame working just fine at daytime and dies at night becouse lack of oxygen.
Judging from your description, you have fridge controlled by computer board.
Those things can have all kind of codes and options, so posting model and better yet pictures would be a good start.
How do you get it restarted in the morning?
Following the comment above about 25 years old fridges working flawlessly. They don't have computer boards to act and I know few car owners who got rid of newer, computerized cars and bought mechanically controlled cars from 1980's
The older cars can use more fuel, but save you a lot on troubleshooting.
Hope you are getting what I am talking abut ;)
