I know a lot of forum articles have been written about the issues with climate control in the XJ6 cars, and I have read a lot of these articles, but I’m not getting any wiser, so I would appreciative any hint and tips that I can get.
I have an XJ6 SIII 1986 and the car has been in family ownership since 1998. When the car was purchased the climate control worked for most of the time, but after a few years it developed a fault that if the temperature control was set to minimum setting it produced cold air, but as soon as the temperature control was moved away from minimum, hot air started to come out. This was sometimes intermittent and my dad that used the car at the time didn’t think it was a problem, so it was left.
I have now taken over the car and I’m trying to sort out various issues.
At the moment there doesn’t seem to mater in which position the temperature control is set to, hardly any hot air comes out. I can also hear the whiring noise from the climate control servo unit on a constant basis, it never stops, regardless of which position the temperature control is set to. I’m also curious what controls the speed of the fan. I can set the fan speed to minimum and it’s working, but as soon as I set it to AUTO the fan is blowing with maximum speed, doesn’t mater if it’s hot or cold outside.
Reading a lot of the forum posts, everyone are saying that it’s the AC amplifier (C45402) that is faulty, but then I found one forum post where people were saying that if you can hear the climate control servo working, then the AC amplifier isn’t at fault. Maybe they are right maybe they are wrong.
Could there be an internal temperature sensor that is broken or what are your thoughts?
Thanks in advance