[denbreeden]

I bought a new trailer last year and had the same issue, overheating problems. One of the Cummins guys looked under the trailer and told me there was nothing directing the heat away from the cool air intake on the bottom. I made a duct out of aluminum and it solved the problem. Miine did the same as yours, shut it off and would not restart but it usually ran all night. Good luck!

Dennis Breeden