[Ferncreeker]

First time winterizing my Montana 3791 RL. Drained all tanks per manual and tips on this forum. Drained water heater removed rod etc. issue is when I try to add RV antifreeze the pump will not pump he antifreeze from the jug.
1. All switches are in proper position. Verified with deale
2. The check valve in winterize inlet port seems to be working. White plug moves in and out
3 pump is/ has been working
4 air is felt coming out of faucets and some water so it’s trying to pick up
5 tried to prime by funneling some antifreeze into hose and holding higher then input port. It took about a cup but when trying again it didn’t take any.
6 spoke with dealer they suggested opening all faucets so we tried no help
7 do have a washer and dryer did not turn this on. Just thought of that

Any other suggestions. If air lock where would you start?
Brand new unit. Little frustrating but feel it’s something I’m missing simple

Thanks
R