I've had the Duetto ATO running on my Waterbox 20 Cube since early January 2021 and came home after a 4th of July weekend getaway to a very low water level and no ATO action. The indicator light is solid blue, even after several re-boot attempts, but no dice. The sensor has been thoroughly cleaned and everything seems to be in order, just no water being added to the return section. I will call customer support later this morning, but anyone have any experience with this? Is the pump bad (already?!?!), or is there something else I can try? Thanks in advance!