Try turning your dash A/C off. When you stop the coach with the dash fan on for either heat or cool, the vents stay open. Turn your key on and turn the fan off. This should close your dash vents. Otherwise your coach is allowing outside air to flow in. This becomes more important in cold weather and you feel a draft.
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Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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