I can't get our 08 8010 engine to warm up. The water temp gauge will never show more than one green bar on the screen. I talked to a local mechanic and he said that the engine will not preform up to its potential until it knows that its warm. I am worried I have a power loss but the power gauge will still climb to over 100%. Any ideas, I was wondering if the sending unit may be giving me a false reading or the thermostats are stuck open. I would think if the thermostats are stuck eventually it would warm but it doesn't. I even quit blowing out the radiator to see if I could get it dirty enough to build heat. That didn't work so I got nervous and cleaned it after a few days of this. Any help is appreciated.