Was driving my 1990 XJ6 Vanden Plas yesterday with the AC on and all is good - -air is cold and suddenly there's a VERY rapid clicking sound behind the dashboard and the cold air stops. Fans still run, but no cold air. Stopping and restarting the car and/or fans makes no difference. Any ideas what's going on?

 

Being a 1990 and a 6 cylinder, I reckon you got an XJ40, as Jaguar call it.

The a/c system in it is worlds apart from the basic system these Series cars have.

A quickie repost in the XJ40 Tech Section will have answers.