Do you know where the freeze is? Is there any part of the pipe that’s exposed outside? A part of my pipes that are exposed outside froze in December. I took a pot of warm water and poured it over the exposed part of the pipe. Repeated a few times and it thawed.

Then I went to a hardware store and got a heat cable to wrap around the pipe. I then covered it in pipe insulation. It seemed to handle the cold weather we have.