And when I got home, the AC wouldn’t come on.  The HVAC guy’s mailbox is full.

And resetting the circuit breakers  did nothing.

Being a retired engineer I did the only thing I could do.  I hit the thermostat with my fist.

AC is back on

Which reminds me of an old story.

A town’s electricity generator failed and various engineers were unable to fix it, so an elderly Engineer was summoned. He examined the generator carefully, then tapped it lightly once with a hammer, and power was instantly restored. He submitted his bill for $1,000.02 and itemized it: “Tapping — $.02. Knowing where to tap — $l,000.”