98 B4000 A/C Clutch engages in FACE/FLOOR mode

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ndccpf1@gmail.com - 29 Oct 2006 13:38 GMT

I kept hearing clicking in the engine bay and realized the (external)
clutch plate engages and disengages but while the positioning knob is
on the FACE/FLOOR position. This is not a position that should engage
the AC at all from what I know (only AC or DEFOG positions should)

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I. Care - 29 Oct 2006 17:16 GMT

> I kept hearing clicking in the engine bay and realized the (external)
> clutch plate engages and disengages but while the positioning knob is
> on the FACE/FLOOR position. This is not a position that should engage
> the AC at all from what I know (only AC or DEFOG positions should)

In my car 93 Probe (Mazda MX-6) the A/C engages in four positions. A/C,
Max A/C (recirc), Defog, and Bi-level (Vent (Face) & Floor combination.
It is only not engaged in Off (of course), Vent (Face) only, Floor only.

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ndccpf1@gmail.com - 30 Oct 2006 02:01 GMT

Interesting...then it is the same for this truck then too. I'm used to
the Japanese (Honda-Toyota) and VW/ Audi mentality on HVAC :)

Thanks !!

> > I kept hearing clicking in the engine bay and realized the (external)
> > clutch plate engages and disengages but while the positioning knob is
[quoted text clipped - 4 lines]
> Max A/C (recirc), Defog, and Bi-level (Vent (Face) & Floor combination.
> It is only not engaged in Off (of course), Vent (Face) only, Floor only.

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phaeton - 02 Nov 2006 17:04 GMT

> Interesting...then it is the same for this truck then too. I'm used to
> the Japanese (Honda-Toyota) and VW/ Audi mentality on HVAC :)
>
> Thanks !!

I was going to note that my 99 Ranger (virtually the same as your
Mazda) works the same way- face/floor does trigger the A/C system above
(i think) 40 degrees F.

No worries!

-phaeton

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