Temp sending switch, fan clutch,....Just because it's been "normal" for you doesn't mean it has been right. Something may have just changed with age & use.
If it's really a concern....Go through the system, new tstat, clutch, cap, fluid/flush.
Ditto this advice. Been down that road so often I know every turn and pothole.
1. Fan Clutch: The fan should NOT spin "freely". There should be a fair amount of resistance when turning by hand.
2. TSTSAT: If you can't remember the last time it's been changed, it should be changed.
3. Radiator Cap: Easy and cheap replacement; again, if you can't remember the last time it was changed then replace it.
4. Radiator Flush: There are a number of posts on how to do this. I'd recommend getting the kit from the AP that provides a "garden" hose connection. It makes flushing the radiator easier and complete.
5. Temperature Sender: This one is critical IMO. Incorrect reading means your asking for trouble.
6. Belt/Belt Tensioner: Even a small amount of slip can result in the fan not turning the revs it needs to keep the motor cool.
6. Radiator: Sounds basic but check for debris that is blocking air flow. Overheated one time on I95 in North Carolina. Popped the hood and checked everything but blocked airflow. State trooper asked what I was using the cardboard for on the radiator. Small piece about 3 inches square but was enough to overheat my truck and embarrass the heck out of me. I was surprised I didn't get a "stupid" sign/ticket.
I know what your thinking, at least I think you do. All that checking and replacing for just a slight abnormal temp reading? Yes. Most will agree. These vehicles don't like to overheat and when they do, other more costly issues are just around the corner.
