I have a 2004 S-Type Sport diesel suto 2.8 and no problems for the 12 months I've had it till now -- the heater , when switched on, just blow warm-hot air all the time, and the AC doesnt work (though the lights come on), whatever temperature set. My local garage doesnt think it's the AC needing a regas -- probably some electrical fault -- does anyone know what it might be?Many thanks -- Alan

Hi Alan. I had the same issue with the dual climate control being warm/hot all the time. I'm not a beacon of information and still learning but if it helps you I was recommended to cycle through the air-con from the lowest temperature to the highest for about 5-10 minutes and see if that flushes the system out because this has fixed the problem for other people reporting similar symptoms. Unfortunately for me I had a cracked radiator (which is the worst case scenario) and was quoted at 400ish to get it fixed from my local independent jag specialist if memory serves me correctly. Hopefully this will not be the case for you! All the best.

Strangely enough chaps, two weekends ago I wanted the AC on and it was blowing tepid air (I had mine re-gassed last year) I let it run for a awhile, full pelt/ lowest temperature but no improvement, so turned it off and opened the windows, however, this weekend just gone, I tried again and it was icy! I do believe it should be run at least once a week?

Steve 

Personally Steve, I leave my A/C on permanently and let the climate control do its own thing.

In fact I always have left the AC on, running auto on climate control. Alan