In article <firstname.lastname@example.org>,
> 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.
The goal when driving is to miss the maximum number of objects.