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Old 10-05-2005, 22:01   #1 (permalink)
dupree8995@msn.com
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93 850GLT HVAC

Hi Folks...

I'd appreciate some feedback on an hvac issue with my wife's 850. The
door [floor, vent, defrost, etc.] function is not operating. Fan spped,
heat and AC are fine. There are multiple DTC's recorded, most relating
to door motor circuits open or shorted to ground, except for "intake
air motor seized" [DTC 414 I believe]. My schematic and diagnostic
information is coming from Snap-On Shop Key, limited information at
best. My intuition suggests that a seized/shorted fan motor might
bollox up the rest of that circuit leading to multiple overlapping
DTCs. I'm a 240 guy with the usual aversion to tearing out half the
dash to repair a fan motor. Any thoughts before I dive in ?

thanks wharf rat

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Old 10-06-2005, 00:01   #2 (permalink)
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Re: 93 850GLT HVAC

In article <1128570661.522969.47290@f14g2000cwb.googlegroups.com>,
dupree8995@msn.com says...
> Hi Folks...
>
> I'd appreciate some feedback on an hvac issue with my wife's 850. The
> door [floor, vent, defrost, etc.] function is not operating. Fan spped,
> heat and AC are fine. There are multiple DTC's recorded, most relating
> to door motor circuits open or shorted to ground, except for "intake
> air motor seized" [DTC 414 I believe]. My schematic and diagnostic
> information is coming from Snap-On Shop Key, limited information at
> best. My intuition suggests that a seized/shorted fan motor might
> bollox up the rest of that circuit leading to multiple overlapping
> DTCs. I'm a 240 guy with the usual aversion to tearing out half the
> dash to repair a fan motor. Any thoughts before I dive in ?
>
> thanks wharf rat
>
>

There's small controller that regulates the infinite speed adjustment
for the motor that usually fails when the current draw from the motor
becomes excessive. Pop out the glove box, underdash panel and knee
bolster...the blower motor is right there. Pull it out and turn it by
hand, if it seems stiff at all replace it. If it still doesn't work at
all replace the controller.

Bob
--
The goal when driving is to miss the maximum number of objects.
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