cxn613 Posted November 2, 2014 Share Posted November 2, 2014 2008 cxu overheats and shuts down during parked regen. Wasn't there when it happened so not sure if engine fan was running. I do know in the summer time while sitting still the engine fan won't run while a/c is on sitting still which makes a/c blow warm air. Once you start driving and moving air through front end it's fine. Didn't know if this fan issue could be the culprit for both problems. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/37581-cxu-regen/ Share on other sites More sharing options...
Macktech689 Posted November 2, 2014 Share Posted November 2, 2014 It sounds like you have a HDMS electronic fandrive, I have seen overheating during parked regens and its almost always a fandrive problem. the easiest way to test the fandrive is to disconnect the connector and run the engine over 1200 rpm it should lock-in and run at 100%, you will be able to hear it . If it doesnt lock-in the fan drive needs to be replaced. Quote Link to comment https://www.bigmacktrucks.com/topic/37581-cxu-regen/#findComment-265326 Share on other sites More sharing options...
cxn613 Posted November 2, 2014 Author Share Posted November 2, 2014 ok I'll try that. thank you Quote Link to comment https://www.bigmacktrucks.com/topic/37581-cxu-regen/#findComment-265410 Share on other sites More sharing options...
cxn613 Posted November 3, 2014 Author Share Posted November 3, 2014 Checked fan today. It spins when engine running and harness unplugged, but it's not the strong fully locked in howling sound. It's the same weather harness is plugged in or unplugged Quote Link to comment https://www.bigmacktrucks.com/topic/37581-cxu-regen/#findComment-265537 Share on other sites More sharing options...
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