Which Model is fridge?
When you state ".......everything is running but the gas light is lit on the fridge." WHAT do you mean?
Do you mean the GAS Burner is ON?
Do you mean that the GAS LED is ON.......manually selected GAS (not in AUTO)?
Do you mean CHECK LIGHT is ON?
In AUTO fridge will swap to GAS if AC Power is not detected......outlet not hot, blown 5A fuse on circuit board etc.
GAS Light...LED on if GAS is selected manually...place in AUTO
CHECK Light ON if burner fails to light/prove it lit.....try several attempts due to lack of propane flow not being established after storage period
More Detail Info would be helpful