CM570 Two new Thermostats stuck open

[Finland25]

They replaced a seal with thermostat as well. Dealer gave them a thermostat by vin so a shop just installed what they gave them. Shop is so busy now with rebuilds and don't want to spend time on research. I trying to figure out by myself with quick serve but there so much superseded bulletins with lot of different part numbers so it so hard to understand which one is current and fit correctly