V8 Vantage correct cooling fan behaviour

[Ralph S3]

Hi All,

I have had a couple of recent drives in my, new to me, 2007 4.3 Vantage and I have noticed on a couple of occasions when sitting at traffic lights that the cooling fans are running at full power and causing a vibration. You can hear it and feel a slight vibration through the car.

I suspect that either one of the cooling fans has a faulty bearing or that the fan modulator has failed and the fans are running constantly. In order to help me diagnose the issue it would be really helpful if someone could describe the correct behaviour of the fans.

I'm assuming that they will do a quick test spin on start up and then the modulator will control when they come on and how fast. Is there a different behaviour if the aircon is on or off?

I'm aware that the fan pack itself is the same as a Jaguar part but not sure about the modulator. Once I work out what has gone wrong I'll start part hunting.

Thanks..Ralph