Why is my moms 2003 buick century almost overheating when we have the ac on?

yesterday we drove about 15 miles to baseball and we had the ac on and it almost overheated. what is the problem with it. i was thinking maybe the thermostat or low coolant or a water pump.Why is my moms 2003 buick century almost overheating when we have the ac on?the male is in the checking my best questWhy is my moms 2003 buick century almost overheating when we have the ac on?When you turn on the A/C it adds a bigger heat load on the car. Check to see that your cooling fans are working and make sure the radiator/condenser have unobstructed cooling from debris trapped. Could also be a bad radiator cap........Why is my moms 2003 buick century almost overheating when we have the ac on?you have a bad auxiliary fan

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