yes it does AC needs some power from engine so it happens....
The ac pump may be seized up.
turn the car on
you would turn the temperature down for cooler air temperatures in a car, in a house the air temperature coming out the vents does not change based on the thermostats set point
If you have the defroster on, the ac comes on automatically.
You have a blocked radiator.
the heating coil may have gone out. when this happens a funny smell will also come from the vents.
the ac in the car cools, the fact you have set a higher temperature than the ambient tempereature means that the car's heater is working and so is the ac, if you wish to heat up your car, turn the ac off.
The engine may be in need of a tune up.
Idle slows down to a stall when you stop or slow down when AC is running. How do I adjust idle or is something else wrong?
if you are in a car turn on the ac or have a portable fan with you
The idle is set too low or there is an electrical problem
If its dropping RPM's when u turn ur AC on then u need to clean ur Mass Airflow Sensor which will be located on the intake. Use B12