I have a roof mount, so not sure about the wall mount A/Cs on campers; however, a window unit in a regular house window, should be tipped slightly back so the condensation runs to the back of the unit and drips out from there. so, see if there is the proper tilt on it, and then check to see if the drain holes are stopped up, so instead of dripping out the back of the unit, the water is filling up and coming out next to the wall.
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2013 198RD
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