Overheating with A/C

1998 TOYOTA COROLLA
191,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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LEOVOMENDEZ
  • MEMBER
  • 26 POSTS
My car overheats after a long drive in the heat with the A/C on. After driving for awhile in the heat the car’s temperature starts to go up. Once the A/C is turned off it stops increasing and returns to normal. Even if I wait a bit and turn it back on it still overheats. What would the issue be? Both the coolant reservoir and the radiator are filled with coolant. I believe there is one fan. And such fan does spin. Note: A/C can work in extreme heat for awhile and works perfectly fine in not so extreme heat. It’s the long drive that causes it to overheat. Even during overheating the A/C blows cold air.
Jul 6, 2020 at 4:11 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,333 POSTS
This sounds like the radiator is plugged either internally or externally. I would take a garden hose and spray through the radiator both from behind and then in front of the cooling fins. check out this guide below:

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down this guide and report back.
Jul 7, 2020 at 5:32 AM
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