2006 M35x heater/defrost fan

[Art Fritzson]

A new problem: My car warms up quickly even in the coldest weather but now the fan, for the whole environmental system, won't operate for about the first 20-30 minutes in cold weather. I switch to manual and the indicator shows the fan speed I select, but the fan isn;t operating. After about 10-30 minutes - longest when the weather is coldest - it starts up.

Any ideas?

Thanks -

- Art