Jeep Overheating

Check your coolant level in the morning while the vehicle is cold. Remove the radiator cap and visually check level. If you coolant level goes to low the temp won't register because there is no coolant contacting the sensor. Then it will overheat unexpectedly usually at freeway speeds. If you have the 4.7 aluminum head engine that spells disaster for your engine. You could have another leak even though the water pump was replaced. There are heater hoses and freeze plugs also that can leak. Good luck.