My '99 does the same, has done it since new.
I just figured there was a reason it bleeds over from other settings.
I usually blast the defroster on hot for a little bit to warm up the
windshield.
>
> On Wednesday 15 August 2007 08:50 pm, Bernd D. Ratsch wrote:
> > Not normal at all. If you're in Panel mode, the defrost vents should
> > not
> > have any airflow.
>
> Ok, thanks Bernd. I'll have to tear it apart and see what's wrong, then.
> There
> should be no airflow at all on the defrost vent, then, unless defrost is
> selected?
>
>
> > Since the '01 is a transition year truck (electric or
> > vacuum A/C actuators), check the small vacuum line to the firewall (if
> > applicable).
>
> When I move the selector knob, there's a faint sound of servo motors. It
> sounds more electric than vacuum, at least to me. I haven't opened things
> up
> yet looking for proof of this (it's dark out, and my garage is currently
> full
> of furniture so it'll have to wait for daylight on the weekend before I
> can
> do that).
>
>
> > If you have electric actuators, disconnect the IOD fuse for
> > about 10-15 seconds and then reinstall. Start the vehicle and let the
> > actuators run through their quick calibration mode.
>
> Which one is the IOD fuse? I removed fuse 25 from the fuseblock, and that
> stopped the servo motor sounds when the knob is turned. Reinstalling it
> (truck off) and starting the truck didn't do anything, though. If they
> were
> supposed to run a calibrate on start up, they didn't.
>
>
>
This archive was generated by hypermail 2b29 : Sat Sep 01 2007 - 00:05:36 EDT