Well FarmerJohn (You know I'm an old farm boy too)
No, I'm not saying that.. The insurance industry says you SHOULD, turn off propane, not you MUST (At least as far as I know)
Their concern is an accident where a propane line is ruptured and thus feeds a fire by the way, not furnace or fridge failures.
Such accidents do happen.... I once met a young lady who, like Evil Keneil, had broken nearly all the bones in her body. The chaplin ask what she was doing when that happened.. She did not tell him... So he tried to guess. I told him that if we told ihm he'd never believe it. Finally she gave me permission to tell ihm. She was SLEEPING.
Yes, Sleeping... in the back of a Winnebago which was being driven through an intersection on a GREEN light when a semi truck decided to run the red. OUCH. No fire in this case but as you can see... If the semi had been going the other way the Propane would have been at ground zero instead of the bed.