Right, I've searched and gathered a little information that might help. First of what happens is I can turn a/c on (frost button right?) and there is no change in air temp from vents at lowest setting.
Info gathering:
When a/c is engaged you can here the compressor clutch make a clunking noise, so that would suggest electrics and gas are OK. Engine revs increase and front radiator fan winds up as well. Checked fuses - they're OK.
However I read somewhere about the electrics on the dash activating motors to select the appropriate setting, so it may be possible that one of these is tired.
Anyway just seeing if anyone else has ideas while I go out and remove glovebox to get to these things (apparently where they are!)
Thanks all,
Carl.