Jaguar 'S' Type heater problem

[andy hughes]

A friend at work drives a Jaguar 'S' Type. The heater only gets really warm when the car reaches high speeds, as soon as he returns to in-town motoring, the heater returns to running cold. This apparently is a common problem on 'S' Types - can anyone advise a solution?

[Bangkok]

Andy, I'm sorry you have not got a solution.  Whilst of very little practical use, your friend has my empathy.  I had a Mondeo (the Ford connection) and I would freeze in town and bake on the motorway.  I used to travel late at night in December with two windows open - at least I stayed awake as my feet sweated and my head froze!

[gerrymck]

Hi Andy,

Have you had any luck with this yet, as I have an XJ6 with exactly the same symptoms!?

Gerry

[Ian Hobin]

Andy, I am getting no heat through at all. It has been like this since I changed the coolant expansion tank which had a crack in it. I think that it just needs a good vent but cannot find a way to do it. Any suggestions?