Mitsubishi Repair: Overheating- 2000 Mits Galant DE, radiator core, radiator cap

Question
Why is my Galant overheating whenever I have the aircon on?

Answer
Dojie: Got some things to check, first I would check your water pump it could be weak, when you put the air conitioner on, it makes the water pump work to harder and so your car heats. Have you checked the water/antifreeze level, that could be low. Radiator core blocked or grille restriced, thermostat faulty, electric coolant fans not working, blades broken or cracked, radiator cap not maintaing proper pressure. Hope this gives you some things to check and then leads you to the problem. Linda