Does A/C compressor run constantly, whether switched on or not?

[Henry VIII]

I was told the A/C compressor on my 2014 SE runs all the time, whether switched on or not. Where it's located beneath the crankshaft pulley, I can't see if the clutch is actually engaged when running, unless I drop the belly pan. I know some cars with complex automatic climate control systems run their compressor all the time--especially luxury ones with large engines--but I was surprised to hear the 2.0 car with simple, manual A/C would. I'm not curious enough to jack up the car and undo the pan today, but I would like to know if all the time I drive with A/C 'off,' thinking I'm being economical, I'm just fooling myself!

 

[kodpkd]

I wondered the same thing on my 2013. I have tried to see if I can hear or feel it coming on but I can't. I also tested it for fuel mileage and can't tell the difference. I think go for it and have it on when you need it.