Gilles I have a different model that is Gas and Electric only and the gas will stay on when towing.
Wonder if the model of fridge
you have is a 3 way? Gas, Electric and DC? Do you have it set on Auto mode? allowing it to pick what to use for power? If so if its running on Propane and it detects the DC from the tow vehicle it could be automatically switch over to DC. As i understand it the fridges when set on Auto mode will always choose Electrical
or DC before propane if either is available. Its not uncommon for the vehicle not to be able to supply enough DC to run the fridge
well. Although the fridge
may stay on that mode as it does detect the DC.
Is there an option button on the control panel that takes it off of auto mode and leave on propane?