Hooked it back up for the heat that's coming. Still bubbling ,but I'm still alive. Stepdad still demands we return it first thing tomorrow. Yeah... not.

The unit in my brother's room is not making this noise, and it is identical. All I'm hearing is a constant bubbling noise, it is quite loud, a bit relaxing but too loud. The people in my household demand I take it back, but after the work I did to get it in there I refuse to. I really don't think it's anything major, I was just curious as to what you all thought it could be and if I was in any danger :-)