2019 Nitro XLR air conditioning ceiling ducts have no airflow, closed the direct vent to force airflow to the ceiling ducts, very little air, air conditioner froze up, checked all the ducts for blockage, none, outside temperature 83.
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Sounds like the partition between the supply and return is loose or missing. There should be a plastic partition between the supply air and return air plenum that you can see if you remove the ceiling plate. Make sure it's sealed and the ducts are sealed as well.
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Salem 29RKSS Pushing a GMC Sierra 2500HD!
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