If it was a false reading, then why would you change the tstat? If it was a bad tstat, then the reading was accurate. Seems it can be one or the other, but not both.I reported in an earlier thread that the beast experienced overheating and that I got a "check coolant" message. Turns out that the whole thing was caused by a bad thermostat. The car probably wasn't actually overheating, as the coolant had not boiled out the escape valve in the radiator cap even though the temperature guage rapidly climbed into the red. It was merely a false reading. However, fixing this took flying in the parts (thermostat and O rings), a wait of a week to ten days, and $500. These thoroughbred cars can be temperamental and expensive machines, but I guess we knew that when we bought them.
In any event, glad the beast is back on the road!