Turn up

[Stevenloan]

A: It's way too cold in here. Could you please turn up the temperature? / Could you please turn the air-conditioner up?
B: Sure. Just a sec.

Hi guys! Which one sounds more natural to you between the two questions "Could you please turn up the temperature?" and "Could you please turn the air-conditioner up?"?

Your answers will be greatly appreciated.

StevenLoan

[Erik_Kowal]

Both sound fine to me.

You've reminded me of a usage that I find particularly troublesome. It's often unclear what a person means when they speak of turning the A/C up. Do they mean that they want it to work harder (i.e. bring the temperature down further), or do they mean that they want to make the temperature go up?

To turn the heating up (or down), by contrast, is not ambiguous.

[gdwdwrkr]

If "It's way too cold in here" is part of the request, then most any wording ought to work; reference to the thermostat, turning it up or down, would perhaps help your servant know what-to-do.

[Stevenloan]

Erik and gdwdwrkr : Thank you both very much for your help. I really appreciate it.

StevenLoan

[gdwdwrkr]

You're welcome Stevenloan.
As a rule, turning a machine "up" increases what-it-does, which in this case would make it even colder in here!