I don't know about a 2007, but newer Cummins will derate and shut down the engine if it sense overheating. That may have been around 10 years ago.
A call to Cummins would give you a quick answer.
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DaveB, Raleigh, NC
2015 Tiffin RED 33AA, w/Honda CRV
VMSpc, Magnum BMK/ARC50
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