Drivers temperature actuator failure mode / observations

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Cadillac Seville / Cadillac Eldorado Forum Discussion, Drivers temperature actuator failure mode / observations in Past Cadillac Vehicle Discussion; So, the driver's side temperature actuator finally failed. No relation between what the setting on the IPC was, and the ...
  1. #1
    naif is offline Cadillac Owners Connoisseur
    Automobile(s): 1999 Seville STS, 2004 Deville DHS
    Join Date
    Mar 2011
    near Virginia Beach, VA

    Drivers temperature actuator failure mode / observations

    So, the driver's side temperature actuator finally failed. No relation between what the setting on the IPC was, and the air flowing out of the system (passenger's side worked fine.) I replaced it (not that hard, actually) - the previous one actually still rotated under computer control, and nothing mechanical was broken, but it had almost no torque - probably a winding in the motor inside the actuator failed. New part (Dorman branded) worked as expected.

    The interesting observation that I made is that when the dial is all the way down or up (60F or 90F), and you turn it past the maximal setting, and then stop for a couple of seconds, the motor pushes a little bit more in that direction, repeatedly (so turn past 60 for a second, wait two seconds, it moves, repeat). Good for lining up the actuator with the flap for initial install.

    (Unrelatedly, I "fixed" a misfire (no fuel flow as indicated by spark plug condition) by tapping the injector with a wrench - guess it needed some "percussive mantainance" Should I just replace it now (I actually have a new fuel injector from a mistaken purchase two years ago), or replace it only if it acts up again, on the assumption that I just jostled whatever piece of crap was blocking it?)

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: Drivers temperature actuator failure mode / observations

    Hard to say. One school of thought is if it ain't broke, don't fix it. The other is if it failed once, it will fail again. I'd probably take the wait & see route, but one hiccup and it's out of there. Your call.

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