Had changed the starter battery last week and now I noticed that only the cooler fan is running on the passenger side, which does not on the driver side. This results in coolant overheating after relatively short driving time. If I read out the error – coolant fan is misfunctioning, reaches lower limit value, short circuit after mass. the error can be deleted but the cooler fan is still not running, For tips on repair I would be grateful thomas driving a 2 004 Phaeton V8, 210000km,