We made a long trip in CA. On the way back, "AC Off Due to High Engine Temp" message showed up. I pulled off from freeway and cooled off the car for an hour in a shade. We didn't turn on AC since. Next day morning, with fully charged battery, the same message comes on. Whenever engine starts, fan is going at high speed with loud noise. The engine is completely cool and engine is running on battery. What is going on? Has anyone experienced this?