Just got my new (well 1994) car home - and wouldn't you know, one thing I forgot to test isn't working right - at least I don't think so. Turning the fan speed control up to 'almost full' is only resulting in weak airflow, you can hear the fan running but the speed is down, it doesn't even start to spin until past half way up the dial. Moving the control to the full extent kicks in 'emergency' mode just fine and it blows a gale at me. Using the temp dials seems to make hot and cooled air come out, but again the fan speed just rumbles along slowly.

Where should I check first? Does anyone know how the system works?

thanks,
james