Thermostat?

[elez1995]

if possible check coolant temperature sensor. when cold, sensor should read about what the ambient temperature is. it can also be checked with infrared gun. it also is checked with voltmeter by measuring resistance.

then check fan, fan should not be working below 200F.
if fan does not operates below 200f then you should check thermostat.

first you check thermostat for leaking
{there is a} guide from quickserve how to check for leak.