Kwdriver84 Posted January 3 Share Posted January 3 (edited) Hey guys, I got a 07 Mack aset 427. My truck started engaging the fan on and off and it won’t want to go over 40mph. I can start it and run it then after a while it starts acting up. I have change both temperature sensors and no solution. Any advise would be appreciated. Edited February 23 by Kwdriver84 Quote Link to comment https://www.bigmacktrucks.com/topic/73722-plz-help-fan-comes-on-and-off-rapidly/ Share on other sites More sharing options...
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