They took my serial number down of my unit and when I take it in on August 5 that’s the first thing that will pop up when they start to do a service on it. My husband said that it was the coolant lines that run from the engine to the radiator up in front. They run right underneath the cab below your feet. Need some extra insulation or something to solve the problem. They’re going to fix our problem or they will know the reason why.