The heater-ac fan and window demist fan have stopped working on your 1998 VW Passat The fuses are ok Where else do you look?

FUSE UNDER HOOD?? OR SWITCH GONE

I found the answer, and solved the problem. Seems that the indicators are fed from the hazard switch, which becomes unreliable if any movement occurs, usually as the result of age or some such thing. Anyway, carefully pry out the hazard switch, and replace it NZD60, and hey presto, all is well.