In my quest for cold air, I have started to rebuild my air-con system from almost scratch. Tonight I have re connected all the vacuum pipes to the mode switch and all their various vacuum actuators. To my surprise I got them all working first time, and doing what they should when they should. I have 1 issue, when I switch between modes on the switch I get a hissing sound from the back of the switch, and it doesn't always completely 'make the connection'. Is the mode switch shot and needs replacing or can it be fixed? Cheers Paul #6463 www.paul.salsbury.btinternet.co.uk