The amount of load it is hauling, whether inside or like pulling a trailer. Also using the air conditioning while going up very long grades on the roadway will cause overheating as the engine has to work harder going uphill and adding the drag of the air conditioning pump only makes that more difficult.
The engine will overheat.
The engine is overheating.
Air inside engine
generally if an engine overheats, but then does not overheat when heater is turned on, is a good indication that the engine thermostat is stuck and needs replacing
A bad water pump or thermostat can cause an engine to overheat. A plugged (clogged) radiator or heater core may also cause an engine to overheat.
The car's engine will soon overheat without some kind of fluid in the radiator. I'm taking off my coat before I overheat.
if you run your engine without antifreeze your car will overheat and ruin the engine.
Engine will overheat and seize
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
The lack of air intake designed to flow into the motor.
The engine could overheat and destroy itself. It's a very bad idea to drive a car with no cooling system.
It will not cause the engine to overheat. You have another problem.