Sounds like a faulty heater fan resistor pack.
wrote in message
> Faulty Heater Blower - 2001 525d Touring
>
> My heater blower has failed so neither the heater or aircon work. The
> control panel is the basic model with knobs rather than the more
> sophisticated electronic climate control unit.
>
> The blower seems to be dead, although very occasionally it will run
> briefly (for half minute or so) before shutting off. The intermittent
> nature of the problem leads me to think that the snag could be a loose
> connection, bad thermostat or faulty control of some sort.
>
> I'm no expert, but if someone could offer me simple advice I would be
> most grateful.
>
> Paul
>
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