Originally Posted by
mmaddock
I had the same problem, worked sometimes, not others - affected both air-con and re-circ switches.
Main dealer diagnosed it as the switch, but they couldn't be bothered to spend time looking properly and were wrong!
Took it to an air-con specialist and they checked over all the wiring and found a dodgy connection right down at the front of the engine compartment around the drivers-side wing (on my RHD car anyway - passenger-side on LHD) There was a connector down there in which the points had corroded badly. They chopped the connector out and hard wired it, worked perfectly afterwards.
Of course, might not be that - but your problem sounds very similar to the one I had.
Matt.