So lets look at how the refrigeration cycle works here and make some conjectures. If I understand correctly, this kind of system removes heat from one side and moves that heat out the other side. An AC unit with a structure as a barrier is a machine that removes heat from the confined structure and vents it to the outside. So, with enough AC units removing heat from sealed structures and outputting it into the atmosphere, seems plausible that getting enough of them together would behave like a kind of heater.

Now, how did the air inside these structures get warmed up in the first place? Under normal conditions, is the air inside the structures WARMER than the ambient air? Does the structure itself somehow more efficiently harness the suns energy to warm the structure more than the ambient outside air?

If the same energy source is heating the ambient air and the air inside the structures - and it is - its the sun here, don't we have a constant amount of energy warming the area? Some of that energy warms outside, some of it warms inside, but the amount is constant.

So how could a device that removes heat from structures to vent it outside be responsible for a warming of the outside air? Unless the AC itself added some extra heat energy in the process OR the structures somehow more efficiently turned solar energy into heat, how could moving heat around cause a temperature increase?

For example - on a warm day in a little European village, everyone lights a gigantic fire and adds non-solar heat to their homes. The devices that remove the heat would then be adding new energy to constant solar energy heating the town. Ambient temperatures would likely rise. But did the AC cause the temperature increase? Didn't the AC unit just move heat from structure to ambient? The AC added no heat in this case.