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
check your gas filter
The ac pump may be seized up.
turn the car on
A car could sputter in the rain if the car needs new seals. There could also be a spark plug or wire that needs to be replaced.
If you have the defroster on, the ac comes on automatically.
You have a blocked radiator.
yes it does AC needs some power from engine so it happens....
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.
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
No