I have a 2006 2.5 V6 estate X Type Jaguar which I have had since 2008 I must say it has been a very reliable car. My air conditioning has started doing this. I find that the air con blows warm after 5 mins so I knock the car into neutral's turn off the ignition and start the engine again after about half a mile same problem so repeat the process again and we carry on for about 10 mins then warm air. I repeat the process and I can then drive from Cornwall to Wolverhampton with a cool breeze keeping the car very pleasant. Same problem coming home usual process then cool air all the way home. I am sure there is plenty of gas because the air is very cold. I have used this technique on local journeys and it works every time. I am lost for an explanation.
