First off.....
IF you run the fridge then LEVEL the RV
Otherwise turn it off
Auto setting...operates on 120V AC element when AC power is available
Swaps to propane on loss f AC power----swaps back to AC when power restored
GAS setting
Manual selection for propane ONLY
No swapping ----stays on gas
Our fridge has been ON for 10 yrs---except for 'defrost' periods
On AC when available, On propane otherwise
Fridge is stocked with condiments, drinks, ice packs in freezer etc
Just have to load up frozen food and perishables when we head out.
Sometimes I slip inside to cool down, have a refreshment when gets too hot & working in yard.
Keeps batteries fully charged
Costs roughly $25/month for the 'convenience' of having rig at home on a FHU site