Heading home I watched the temp gradually rise, I didn't give too much concern since it usually fluctuates. That is until I realized it was much higher than usual. Popped the hood and realized the fan wasn't on, checked fuse and then turned on the A/C just to see if it would work. And it came on... Then I turned off the A/C and it still ran... Now all seems to be working as usual...

What could have happened here?

 

It did it again and it let my temp get way up there. Realy could use some input on this... Ideas or any toughts at all...