I totally diverged from my intended post.

My 'fridge drain lines are also blocked so the freezer is building ice and the back and bottom of the fridge freeze everything near them.

My air compressor died two weeks back while filling a tank beneath the house so I have nothing to blow the lines out with until I buy another unit--the piston rod broke.

I'm just glad I got air into the tanks before this cold weather hit or they could freeze as my main water tank is outside; I have the coldest cold water to drink in the winter!