I am curious what you find in the end. My 2004 fridge does not work on electricity, but OK on propane
. I have never heard any gurgling when it operates, or never heard of it, so curious what other people say. The heated section is where the "bubble pump" moves the fluid up and it then flows down along those meanders. More things of interest happen along the way, of course. The bubble pump is very much like the coffee percolator.