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..
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..