The last couple of weeks I was noticing that the car was running just the slightest bit hotter than usual. I figured it was just the summer heat.
A couple of days ago I noticed the radiator fans were cycling from slow to fast fairly quickly. Hmm, dosen't seem right. Today, I was checking the AC charge and I discovered the right side fan did not work on low speed at all.
So I replaced the fan resistor and all is well again.