If the cooling fan was running, but it did return to normal after driving, chances are it was simply related to the outside temperature. What I would suggest is to simply make sure the coolant is full, there are no leaks, and keep an eye on it. If the problem returns, let me know. Oddly enough, since it returned to normal when driving, I don't think it's a thermostat issue. Perhaps you may want to flush the cooling system if it happens again.
Here is a link that explains how it's done:
Let me know if it happens again or if you have other questions.
Wednesday, June 10th, 2020 AT 9:51 PM