Am I to understand that your friend has his RV covered with a storage type fabric protective cover and runs the AC unit while it is covered?
As the AC units need to move air in the external unit in order to transfer heat, I would not recommend that. Sounds like a good way to overheat the AC unit.
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Current vehicle list: 17 RAM 3500 4x4 Cummins Aisin 4.10, 24 Cedar Creek 40CBK
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