Hi and thanks for using 2CarPros.com.
When the engine overheats, the computer will shut down the AC to eliminate added drag from the engine. That is normal. However, the coolant issue and overheating is a problem.
The best thing to do is pressurize the cooling system when it is cool. Then, watch for where the leak is coming from.
Here is a link that shows how this is done:
https://www.2carpros.com/articles/car-is-leaking-coolant
Let me know if this helps or if you have other questions.
Take care,
Joe
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Friday, October 5th, 2018 AT 9:13 PM