Running hot when reservoir is cool why
My car has 229000 miles.
My car has an automatic transmission.
If you did not replace the thermostat then you should replace it and then refill the system after bleeding out all the air in the system. Check to make sure the fans come on when the temperature goes up. If you want to have the car checked, a technician from YourMechanic can come to your home or office to make a proper diagnosis of your overheating issue before you move forward with any repairs.