Once or twice a month overheats real quickly, you can watch the gauge move to hot in about a minute or two. I turn off the car wait a few minutes then restart the car the temp returns to normal. It will run without overheating for a week or two then the same happens again.
Overheats on 2006 Lincoln LS
If the problem returns after replacing the thermostat, have the system tested for exhaust gasses in the coolant which if found would suggest that an air pocket is forming and delaying the thermostat from opening.
I dont know miles but I think your thermostat is sticking,good place to start...
Replace the thermostat and use a better grade, not the cheaper one, they are a better 1 time fix.