I haven't had my Yeti long but, had an issue with running cool and temp guage rarley moving. (symptoms) Running with thermostat stuck open.
A work colleague had a similar issue with a DSG equipped Golf.
He told me that DSG cars have a second thermostat in the gearbox cooling system. He suggested i start there to see if it fixes the problem before commiting to a full thermostat replacement.
20 mins and £20! sorted.
It is located on the right side of the engine as you look at i