Agree… It is going to heat up again. I’ll have to keep an eye on our central AC. I think it might be 
the bed after 19 years. The main unit is a name brand but the compressor / condenser they connected it to is a no name… Builder was as cheap as possible with certain things…
It still works fine but seems to be on a lot longer than it used to be which is a giant waste of $. After 17 years we had it recharged and it wasn’t even that low. Tech didn’t think it was leaking and nothing is freezing up which means it’s not low…
It’s odd that when an AC is low on refrigerant, it freezes up. You would think it would be the opposite.
When it did run low a couple years ago, the entire furnace was a block of ice and took more than a day to thaw out…