Hi, Just had a full service and cam belt change on my 02 A4 TDi 130 (b6). Since this was done my air con dosen't work, pump dosen't turn on. I know it worked before as the demister always cleared quickly. Are there any checks i can make myself?? garage say they don't touch aircon while carrying out this work. One thing i've noticed, the belts aren't very tight even though it's still only 2 weeks since the service. Also had aircon regassed to see if this was problem. no such luck. I do have a failed coolant temp sensor, guage sometimes works, most of the time it dosen't. Could this cause air con problem? Where is the sender on the TDi? Ran Vagcom, other than Temp sender error, no othr fault codes. help please - weather i starting to get hot!!