If this is the first time using the coach, it is possible the 12V power switch is set to off in the outside unit.
There is a red power button on the inside temperature controller. If the display does not light up when you turn the temperature display on by hitting the red button, then the unit is powered off outside.
You can open the access panel on the side of the coach and you will see a white switch. make sure that is in the on position. Then try hitting the red power button again on the temperature control unit inside the coach.
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