no
yes
Your AC should not cause your car to overheat. Your car probably has a different reason that it is overheating. However, your AC adds additional heat to the engine. Your car wants your AC off until you get the problem fixed. You would have a similar situation if you sprained your ankle while you carried your backpack. Someone would tell you to put down the backpack until you got your sprained ankle taken care of.
It can if their is something wrong with the cooling system.
Yes---after air goes thru condensor,it is warmer than if ac is off. Clean the radiator
The ac pump may be seized up.
Because it might overheat or need a break.
turn the car on
Yes, low coolant will cause it to overheat without the AC; that is not the only reason that will cause overheating however.
When the AC is running, the engine must work significantly harder to perform the same tasks it normally does. Extra work translates into more energy, which in turn creates additional heat. Without the proper level AND mixture of coolant, the car engine will overheat.
The squealing noise from your car's AC when you turn it on could be due to a worn-out or loose drive belt, which may need to be replaced or adjusted by a mechanic.
If the engine is overheating, running the ac will make it overheat faster. The ac only cools the inside of the car, it actually adds heat under the hood.