Car Overheats When AC Is On: Causes, Diagnosis & Fixes
Quick Answer: A car overheating when the air conditioner is on signals an underlying cooling system failure—not a problem with the A/C itself. The A/C compressor adds 5–15% extra load to your engine. If your cooling system is already compromised (low coolant, faulty thermostat, clogged radiator, or weak cooling fans), this additional demand pushes it…
