The engine should not reach anything hotter than 225 that is the max engine temp that detroit wants it to run.
Freightliner cascadia fan clutch solenoid.
The ecm will not command the solenoid off until it reaches 212 degrees 220 degrees f or if oil temp and intake temps run high as well.
Very simple repair mine was 128 00 yours may be more or less.
Engine fan stays on all the time ac pressure is good swap the solenoid for the fan nothing change looks the truck is asking for fan need some troublesh read more.
Bad fan solenoid valve radiator fan stays on.
I show how to replace a bad fan solenoid on my freightliner century 2007.
2010 freightliner cascadia fan clutch stays on replaced solenoid and still stays on i put power and ground on the connector to test fan clutch and it engages correctly there is voltage going to the so read more.
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How to install a manual fan clutch switch on a freightliner cascadia dd15 2012.
2013 freightliner cascadia cummins engine.