[Oscar99]

I have much weirdness with the heater fan in my 96 CDE Auto..

First off the fan is always on.. even when the entire unit is turned off you can hear the fan going.. Only way to kill this is by pulling the fuse.

Secondly, I can only get cold air out of the unit UNTIL it's switched to HI at which point it blasts out enough heat to melt your eyeballs..

BTW I also know when the fan is running as it howls constantly..

 

[boxman]

the heater fan running all the time is usually a result in the fan speed regulator going bad, this is on the aircon reciever under the plastic panel below the wind screen under the bonnet, and the heat not working unless you have the acc set to HI could be caused be the cabin temp sensor (below the clock) being covered in dust so it can not messure the cabin temp

 

[Oscar99]

cheers boxman

 

[benji9k]

Compressed air seems to solve almost any problem, doesn't it?