My fan clutch kicks in at 207 degrees according to my OBDII scan gauge. Normal cruise is 198-202 degrees. I have no faith in dash gauges. When the other fan clutch was going bad my engine would overheat quickly.
Perhaps the wrong fan clutch was installed as the correct one is VERY VERY difficult to obtain. Shops tend to grab one for a typical GM 8.1L engine and they WILL NOT work. The replacement that was put on mine was part number 28210908 and is made in the USA by Hayden. WorkhorseParts.com may be able to help you. The WH part number is #W0000193