Because the bi-level is really A/C BUT it is not labeled as such (Jack Hilton
posted that there is a TSB on this). The center knob controls which accessories
are used - just the fan, fan and A/C, etc. and where the air is put out (feet,
dash, both, defrost). The bottom knob only controls where the air goes before
it pumps through the vents - set it to full cold, and no air goes through the
heater core. Set it to full hot, all air goes through the heater core. Set it
in the middle, half goes each way and is then brought back together.
Kenneth Eng wrote:
> Shouldn't the foot and dash setting (bi-level setting) use just the vents on
> the front of the dashboard and the vents in the footwell? This setting is
> different then the ones that are actually marked with a windshield defrost
> symbol (the settings on the far right). I think there are 2 defrost
> settings for the middle knob. One for the windshield only and one for
> windshield and footwell. I realize that the AC would come on for the
> defrost setting but why would the AC come on in the bi-level setting with
> the temp setting set for maximum heat?
>
> Ken
>
> -----Original Message-----
> From: A. S. [mailto:adakota4x4@hotmail.com]
> Sent: Tuesday, March 06, 2001 12:16 PM
> To: dakota-truck@buffnet.net
> Subject: Re: DML: AC compressor kicking on and off
>
> Yep, any setting that has anything to do with the defroster will kick the
> a/c on...no matter where the temp setting is. Most vehicles are this way.
> Even my 95, which has a button to activate the a/c, does this. The button
> can be in the a/c off position, temp setting to the hottest possible, but if
>
> I hit the defrost button, the a/c comes on.
> --Aaron--
> 95 DSRC 4x4 V6
> www.geocities.com/adakota4x4_95/
>
> >If you're talking about the "foot and dash vent" on the right side of
> >the middle know, that activates the defroster which uses the a/c to
> >dry the air before blowing it on the windshield.
> >
> >97 V6 Auto
> >e-mail mcrumley@airmail.net
> >
> >"In the beginning the Universe was created. This has made
> >a lot of people very angry and been widely regarded as a
> >bad move."--Douglas Adams
>
> _________________________________________________________________
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