Here is an update on the on-going saga of my engine fan. I took my truck to the Western Branch Diesel in Caton OH. They fixed a "Factory Modification" (recall) issue. There was a problem with freeze plugs popping out for no reason. It could happen while you were running. I had them look at the fan. They agreed that it should not be comming on everytime you turn the AC on. They changed the high pressure switch even though it was reading ok. The fan still runs all the time. The ECM settings are correct. They did find 5 small coolent leaks and fixed them. They also changed an ECM setting so my jake will work when the cruise is on. I guess it's back to square one on the fan issue. By the way, they charged my NOTHING for ANY of the work. The recall thing was coverd but there was no labor charges or anything for the other repairs etc. Layoutshooter