Or does it automatically engage / disengage depending on the thermostat / temperature setting like any other air conditioner
My guess is it's always on , and just mixes outside air to warm it up.

Man do I ever love the AC in this car.
Cold as ICE .
Beastmode

 

This might sound a lil mean and I'm sorry, but sounds like your understanding of an automotive ac system is just one big guess . The compressor cycles on and off when the ac is turned on, and it has to do with the internal pressures of the refrigerant, and not what your temperature setting is for your vents

 

No you don't sound mean
You sound like an as.shole

The point being I have yet to hear the compressor cycle off when AC mode is activated

 

Nah, bro, this is what one sounds like

 

The G35 uses the newer style of variable pitch AC compressor (works almost exactly like variable pitch turbochargers if you're familliar with them), it scales the duty cycle to match the demand and there is VERY LITTLE cycling of the compressor.

 

This.
Thanks bro

 

You know how I know you're a loser ? You don't know sh:it about AC and pretend like you know what you're talking about but you really don't. Cleric670 just confirmed this. And stop stalking me. Do something with your life.