Guess we are lucky. Since the dealer replaced ours in the 2015, we have been trouble free for a year now, running at an average of 36-38. Did add some baffling at the top and installed a 4 inch fan at the bottom to push air up and out. We have noticed when we put hot food in, temp jumps but then comes back down.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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