If you leave it on AUTO, make it a practice (or add to your departure checklist if you have one) to check the frig a minute or two after disconnecting shore power. If for example you were out of propane on the tank that was open, when you unplug shore power, the frig will attempt 3 times to start up the propane burner and then lock out. Better to discover that before you go down the road for 7 hours.