Yes, low coolant will cause it to overheat without the AC; that is not the only reason that will cause overheating however.
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
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.
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.
Cooling fan not working, or your cooling system needs a complete service. The cooling fan should be on continuously when the A/C is on.
A car is more likely to overheat with the AC on because the AC radiator is in front of the cars radiator expelling heat. so if the engines cooling system is operating near capacity for some reason the heat coming from the AC can be just enough to tip it over the edge. The engine also has to work a Little harder while the Ac is running which would not help either.
Are the fans in front of the condenser running?
the difference between ac and dc is that the curren on ac is moving alternative and on dc is moving directly