Fan Controller
On our 2006 Itasca Horizon w/Cummins 400 We had some temp issues out west in June. Warning temps when climbing and I had to downshift to cool things off. Got home cleaned the RAD and all looks good. I...
Forum Discussion
Gator48 wrote:
On our 2006 Itasca Horizon w/Cummins 400 We had some temp issues out west in June. Warning temps when climbing and I had to downshift to cool things off. Got home cleaned the RAD and all looks good. Issue now is the cooling fan runs all the time on high speed....IF the AC is on. If the AC is off it runs low speed. Doing some research it seems the fan should be off until the engine reaches operating temp. Then low until nearing high temps. Is this correct?
Sounds like your controller is working as it should. The fan does run at low speed all the time and as the temp rises to the danger zone, the fan will speed up. The fan does run faster when the air conditioning is on. Mine runs at a higher speed even when the vent mode is selected.
