Howdy! I'm a new homeowner and it's the middle of summer and it's hot outside and now it's getting warmer inside. I think this is happening because one of my air conditioning doodads has ceased to function. There's this little doohickey next to my actual AC unit in the basement that Is making all sorts of struggling, gurgling sounds, and also happens to be putting water out of a little black hole on the top.
Our main level thermostat has now ceased to function, and we're not getting any cold air blowing.
What is this thing and how do I make it behave?