Now that temperatures are dropping below freezing, I decided to fill my wiper fluid reservoir with winterized fluid. I used almost an entire bottle, so it must have been almost empty, but there was definitely some summer fluid (without antifreeze) left in there.
However, after I filled up the reservoir with the new stuff, I realized that the bottle of leftover summer fluid I was keeping in my trunk was frozen completely solid! If it was frozen, so must be the fluid in the system.
Would the frozen fluid cause any damage? Will the antifreeze in the winter fluid cause the frozen fluid to melt?