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Good afternoon and welcome to JustAnswer!!
How often does it run hot and when it shows hot is it really hot? If the fan coming on to cool the radiator? What is the last 8 of your VIN number?
So yesterday was the first time it ran hot? Do you have the 4.0 or 4.7 engine? Is your coolant overflow full? Was the fan coming on?
Thanks for the reply!!
Ok if the fan is coming on then I would like to know if it really is running hot or you have a temp sensor issue.. Do you have access to a IR Temp gun, if so shoot the top radiator hose and see if it's over 220. If yes then it's running hot and then you would need to feel the top and bottom to see if both are hot or one is cold. Since the fans coming on and if it's running hot then it's going to a flow issue, radiator, water pump, theromostat. If it's really not running hot I would try a coolant temp sensor.. If that doesn't do the trick then you will need a scantool to actually monitor the temperature sensor and see what it shows...
I hope this helps,