[jdkskyking]

Has this problem just started or has it been there since you own the coach? What modifications were made and does any timeline coincide with the overheating problem?

We live 17 miles apart if you ever need any help.

The first time I realized I might have an issue was in 2020 climbing a hill out of Canon City Colorado.  With the help of Richard and Tom, I finished the trip. When I returned home I replaced the aftermarket regulator (CAT terminology) with the recommended CAT regulator 190°-210°, flushed the system with CAT cooling system cleaner, replaced coolant with CAT ELC, and cleaned the radiator and CAC as best I could. I clean the stack routinely now, Dawn HD and SimpleGreen for Aircraft. 

I also found out the C-13’s ECM was never programmed to control the hydraulic fan solenoid, the fan had been running on high its entire existence. I now have the ECM programmed properly and have installed a thermal switch in the coolant system to turn the fan on high at 210° vs the CAT ECM preprogrammed temp of 217°. Try to get ahead of it. 

I’ve asked Newell about replacing the radiator but I thought a last swing at cleaning it would be a good idea. The radiator needs to come out, disassembled, measured for a new core. Three or four week process conservatively. Newell can’t have it sit at the factory that long. 

Now I know the stack is a ICS system (Industrial Cooling System, Milwaukee Wisconsin).

We need to get together!