Can you clarify... sounds like your fridge does not cool on either propane or AC.
I have experienced no cooling on propane, due to poor flame, but if no cooling on AC, that would be something different. If the propane flame is not hot enough, it can make the chimney hot to the touch, but not hot enough to produce enough coolant to keep the fridge cold. Cleaning propane lines would usually restore full cooling capacity.
I would think that you could find someone at the rally to help you troubleshoot your problem. Good Luck, hope it gets resolved quickly.
Kirk & Shelley
Surrey, Beautiful BC, Canada