Fans come on at 212 and 225 I think. In that neighborhood. Second fan should be on when the AC is on.
Are you actually reading the temp from the sensor (with a scan tool or an IR thermometor) or just from the dash guage? The dash guage is hardly accurate, even for general ballpark figures.
Which fan turns on? If its just the secondary check the primary's relay and the fan itself. Otherwise the PCM isn't getting the signal from the ECT or its skewed (loose connection or dirty connection can do that, its resistance-based and that can vary based on operational conditions of the wiring)