My Norcold N611 Fridge/Freezer thermostat seems to have packed up. It has a flashing light alarm that the manual states shows that the backup thermostat is in use. It also states that it is not repairable by customer and must contact service engineer. I have looked on Norcold Europe website but it is not much help. Has anyone had any service engineer from Norcold and if so how did you find/contact them? Has anyone had to repair/replace thermostat and is it easy job or, more likely, complicated or a whole new unit ?