[ccjohnson]

I understand you completely! We have always had some similar issues with our coach. One time on our way to Yuma we had some over heating issues. Stopped at a shop & had radiator steam cleaned. It helped quite a bit. You could definitely visually see areas that were plugged with dust/oil material. When we first got coach, blower went bad & pumped a bunch of oil out that got sucked through radiator. On my latest ordeal, fan came apart & damaged radiator. When repaired Stewart & Stevenson shop said that on test drive highest temp they saw was 193F. They measured off DDEC. They told me our gauge was showing +/-12F high. Spent a lot of time in 22nd & 3rd driving from Kingman to Grants after that due to my paranoia of high temps. I have since got Silverleaf but have yet to take the coach out to try it. I tried the run an independent ground trick with limited success. I will get a new analog gauge if my Silverleaf confirms that it is not accurate. I have used temp gun on radiator and thermostat housings to satisfy myself that the gauge was reading "hot". But still have the paranoia. My gauges are all original as best I can tell so at 23 +/- years I guess they can be expected to hit the end of serviceable life at some point. Based on my experience I would say check with a temp gun. If it confirms DIGI gauge readings, go by them & replace dash gauge when you can just for the peace of mind of having both give you the same information.