My 2007 Itasca Horizon 40' has seen more Freightliner service centers then campgrounds since we purchased it. I have been told the overheating is cause by everything from bad fuel filters , clogged Radiator, bad sensor, changed, bad pump, changed, and on and on. I took it the last time to a Freightliner service center north of Denver Co. The mechanic did all the test and came back with the only sensible answer. It is a great engineering goof up that Freightliner will not admit to. To over come the problem on hills and mountains you have to keep the RPMs at 2200 or above. I asked if there was a retrofit to put an electric fan drive with a temp control like most other manufactures have on the chassis and he told me not that he knows.
So now we just watch and manual downshift, I don't know why they put cruse on the unit its a waste of money traveling the mountains
