[alfa] Re: 164 Step motors - Changed MY '94

["David H. Rogers" <saturndr@xxxxxxxxxxxxxxxxxx>]

While the motors remained the same, there was a change starting in '94 w/the
AC controller (LCD display).  While stationary, the stepper motors receive a
periodic pulse from the controller to maintain their relative position.
This pulse caused "hammering" on the stepper motor gears and is what
ultimately causes the "wear & tear" leading to failure.  In '94 the
controller was reprogrammed to reduce the pulse frequency by 50% to help
improve life expectancy of the gears in the stepper motor.  I left
employment with Alfa in '96, so I don't know if this change produced the
desired improvement.

David Rogers
Spring Hill, TN





George Washington wrote:

> Does anybody know why the '94 and newer 164s don't seem to exhibit
> stepper motor problems?  Or do they?
>
> I'm going to pull the dash out of my '95 Q sometime in the near future
> to re-place all the seals in the a/c vent system (distribution flap
> gaskets et al) and would like to know if I should put in replacement
> gears while I'm in there.  I have never heard of a 94 or newer 164
> exhibiting any problems in this area and my last Q had 100K miles on
> it when I sold it without a hint of a problem.
>
> Thanks!!!!!!!
>
>
>
> Tim Annett
> Cincinnati
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