When my washer was brand new (not connected to any hoses), I noticed a liquid sloshing sound whenever I moved it around. The washer has been disconnected for about 2 years now and the liquid sloshing sound is still there, so I don't think this is water that has accumulated from washing clothes. I have done some research and I think that it is used as weight to help balance the washer as the drum spins around.
My questions are: what is this liquid, its true purpose, and will it freeze/expand if left in a non-climate-controlled location? I have moved the washing machine to a new storage location that is covered and sealed from the elements, but has no heating or cooling.