Selling an older model of the IM hydrofill ATO. I believe one of the sensors is malfunctioning. Basically, the sensors recognize if the water level is too low, and turns on. Then it gets stuck on. If you unplug the whole unit and replug (once filled), it will recognize the water level is good. I do not know anything about electronics, maybe its an easy internal issue, maybe not. Regardless I do not have the time or effort to try and figure it out or diagnose further. The price basically covers shipping + PP fees, so I'm really only going to get like $2 from this sale. Just want to see if anyone wants this before it goes into storage or the trash lol. I will send vids / pics if interested! just PM me for my number