How many miles on this jeep? Has any work lately been done to the cooling system? Any leaks or having to add hoat coolant into the reservoir?
Inspect to make sure that the coolant is at the correct level in reservoir! (Hot/cold line)
Also check to ensure that the reservoir cap states 16psi.
The jeep temp gauge should sit in the middle if the gauge & everything else is working correctly.
The electric fan does not even turn on until 219 degrees, but the fans should come on if you select defrost. Use on obd2 reader to see the actual temp being reported.
Yes it could be the fan relay if the fan doesn't come on by 219F.
That being said if nothing's been done to your coolant system, a complete drain & flush along with a new MOPAR thermostat & hoses, even a new water pump may be in order.
Mopar Hoat coolant or Zerex G-05 is the only coolant to be used, and it does not mix well if the wrong coolant has ever been added, justifying a flush if unknown.