Fault Code F and A
You had it working on AC in 'auto'
At some time the AC power became 'unavailable' (Fault A) at which time fridge swapped to GAS. BUT for some reason the propane failed to light off/prove main flame within 30 seconds so it failed (Fault F).
At this point it 'stopped' operating.
Loss of AC could have been from storm etc.
GAS failure ...... low DC Voltage, bad ignitor, bad gas valve, dirty burner etc.
You tried to switch to propane......won't fire.
Have you tested DC Voltage, checked the DC fuse on fridge circuit board.
Does it spark but not light......gas valve getting voltage, burner obstructed
No spark......DC voltage
Download/print manual (in link) and test out fridge.
Could be simple/cheap