I don't think your truck is overheating. Ford designed them to thermosiphon, just like the Model T. When the water heats and cools, it will work its way through the radiator. Not to mention your oil does a good job of that by itself. The again, a clogged radiator will hinder both of those processes.

A coolant temp sensor or sender will definitely throw a code, a simple $30 code reader at autozone will tell you "coolant temp sensor malfunction" My girlfriends family has one and occasionally if I get a code I'll borrow it. It's a cheap little thing but it works, it's always a good tool to have.

But without that code, there's only so much we can do here.

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2007 Regular Cab - 2.3 DOHC - 5 Speed Auto - 4.10 Gears - Maxtrac 7" Lift - Fiberwerx 3" Fenders - Bilstein 5100 Series - 15x10 Ultra 164's - 35x12.50x15 Red Letters - Custom dents