f1larry

A school day for me too. I was under the impression that the majority of vehicles had a clutch of some sort connected to the the compressor. I always noticed when my 1.8T Golf's A/C was switched on/off, as well as the R53 Mini we had, but never notice it with my 330d BM and assumed the A/C compressor made little difference to the power o/p of a 3L diesel whether it was on or off. Hopefully I can get the issue sorted as it's not a bad little car (the ASG box takes some getting used to - I find coming off the gas a tad just as its about to change gear helps quite a lot!) and suits mum's little runs to the shop etc, but she really wouldn't mind the A/C working to take the edge off the summer weather. I'll have to dig my VCDS laptop out from my old Golf/Polo days and see if that can shed any light on the problem before a visit to the garage. Cheers, Larry

Cheers pal.

Great, thanks for the info. I'll take another look when mother pops over for a cuppa - it's her car and I thought I'd take a quick look at the A/C whilst I was changing the oil and filters etc. Couldn't see any relays nearby when I was checking the fuse though. Thanks again,

So the A/C compressor is running all the time the engine is turning and the A/C is activated by opening a valve, allowing the refrigerant to flow through the cooler? Seems a little inefficient to have something running when you don't want A/C on, especially on a smaller engined car. Also, what are the wires going to the compressor for then? Sensor wires? A 10A fuse seems a little excessive for a sensor and the diagnostic port, don't you think? Of course, if I knew about the A/C system on a Citigo I wouldn't be asking the question here so any help is gratefully received. Thanks,

Thanks for the prompt reply. Looks like that's the way I'm heading then... Cheers

Clockworkmonkey - did you discover what the issue was in the end? I'm having the same issue. The A/C button lights up, the fuse is good but the magnetic clutch doesn't appear to be engaging. I've been trying to find the a/c relay but I've no idea where to look.