Fridges...start with the 'maybe' solution. DOes she know where the fridge outside cap is? Take it off...turn on fridge. Is there a clicking sound? Actually..does it ignte even? Lets say tho clicking sound..no ignition. INside..turn off fridge power. And no need to fear... nothing will go kaboom. It has fail-safes up the wazoo. Ok..clicking but no igntion...where the copper line feeds into the bottom of that tall tube. There are small screws holding a wind shield. She needs to remove those 2 or 3 small screws..put them on the far side of the box so to not drop on ground and never find again. (here is an often cause of failing ignition...that tube goes up to roof...and gets a layer of carbon like material on it. When we hit a bump...sometimes flakes of that stuff fall down onto the igniter..remember the fail-safes? That is one..anything on the igniter no workee.) If she has a piece of plastic tubing she can blow into/theu? a straw? and direct it right into the bottom of that where that copper gas tube goes...and blow. That air will clear any of those flakes off. Blow a couple times...it might be teeny tiny or size of a quarter. If there is any sign of material have her pound on the tubing going up to dislodge the stuff. Even if she sees nothing..blow more. Then into RV and turn of fridge. Go out and listen..see if there is clicking at first then the ignition of gas. If so...put screws back in and there she goes. She can reset screws wuth or without turning fridge off/on. No big deal but no need for her to get worries either.
I cannot begin to count how many times mine and others have had this happen. I have saved many a trip ending fridge failure by clearing off that igniter.
If that doesn't work...back to square one.
Gary Haupt