Want this question answered?
Yes, low coolant will cause it to overheat without the AC; that is not the only reason that will cause overheating however.
The air comes from the air outside and the air conditioning system in the car turns this into cold or warm air.
The 1939 Packard was the first car with a true air-conditioning system.
Under normal conditions a modern vehicle should not overheat when the air conditioning system is on. The first steps to investigating this condition are ensuring correct coolant level, condition, flow and thermostat actuation.
We are afraid to use the unit 24 hours because it might cause to overheat .What is really the cause of overheating?
Automotive air conditioning is the ac unit in your car. It's what "conditions" the air in your car, ie keeping the temperature inside the car cool or warm.
No use for exhaust in car air conditioning
Low coolantPlugged or restricted radiatorBad thermostatBad water pumpDefective radiator capSystem airbound
Air flow. Check the electric fan, check the coolant, and might be time to replace the rad. Does it overheat at idle, and/or on the hi-way?
No cars "need" air conditioning. It is a personal preference of the owner. Most people would want air conditioning in their car as an option. Mississippi's hottest day was 115 degrees!
changes the air temperature inside
I am not sure what the national chain is where you can get the air conditioning in your car serviced. Ask your car manufacture or your local garage or ask family and friends.