Fresh water tank won't fill (froze?)

[hikeril]

Arrived at campground today for tradition thanksgiving camping trip. To my surprise unable to fill freshwater tank. Some water did manage to make it into tank but then stopped as if it was full. The tank is about 65 gallons in a 290rl avalanche. Is it possible that the air hose next to the freshwater fill is froze. It spits water out if I try to force the water in, when removing the hose the water flows out of the fill. It was winterized about a month Ago draining all tanks and using anti freeze in all lines. I was planning on trying to fill tomorrow after operating furnace overnight and high temps mid 40's tomorrow. Any ideas would be helpful as the DW is not too happy.

[MarkS]

There is probably ice either in the fill hose or the vent hose. It may thaw with the furnace running over night.