To me it would be highly unusual (not impossible) to have a failed pump in a brand new coach. If the pump wont draw water through the winterization port you may have an air leak on the water filter seal (which you opened to check for plastic bits); plus make sure valves are correct for the draw from winterization line. One other thing to check is if any fresh water tank water will come out of the winterization line by gravity (valves appropriately set to do this). It is not impossible to have plastic debris blocking the feed line from the fresh water tank to the first valve. No gravity water flow means there is something blocking the line.
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