why am i still overheating? on 2000 Mitsubishi Galant

replaced radiator,cylinder head, hoses,thermostat,sensor,timing belt, water pump. antifreeze temp was reading 248 degree f, but the temp guage is redlined.what can it be?

Asked by for the 2000 Mitsubishi Galant
Is that 248F with a scanner or infra-red thermometer? Are the rad. cooling fans coming on at about 215F?
the temp was tacken with scanner the fans are running but still hot
Do they stay running constantly or are they cycling on and off?