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AC Noise 900 1994

posted by  Mybricks on  Mon Jun 13 04:03 CST 2005
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last visit: Mon Sep 22 01:55 CST 2008
[RELATED]

I have been reading much about recent A/C issues. My issues are similar, but also have another that has not been mentioned. My A/C does not blow cold. But when I press the A/c button, there seems to start a little motor that I can hear revving, in addition to the normal evving of the engine. It is more noticable at low speeds and RPM. Does this extra noise indicate a specific problem. I have no idea. Any and all comments appreciated.








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    AC Noise 900 1994

    uid 19's pic
    posted by  jbowers on  Mon Jun 13 08:04 CST 2005
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    last visit: Sun Jan 22 13:49 CST 2012
    [RELATED]

    If you have the ACC or ECC automatic system, there is an electric motor that turns the air mixer door in a servo system. If one of the gears has broken or become disconnected the motor probably would run forever trying to balance the servo loop.
    --
    '96 965, 16' wheels, Michelin Pilot Sports, rear 18mm bar + Koni, 204HP cams, 126K. Put 200K on '85 745 TD.







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