I went to a customer that picked up a 3500c from an auction. It worked for about three months with no problem. Now first thing in the morning when they turn it on it generates a C445 call for service error. They reboot it once or twice and it runs all day. Next day same thing. The WEIRD thing is, 08 400 is always at 0. It never counts and they dont know how to reset it. Whacky