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Have you run a self-diagnostic on your ACC? It's not perfect, but it does identify some faults. But not the ones I describe below...
Maine weather isn't much different from NH and we've had none of the issues you have across our three 9Ks with ACC. And as I noted in an earlier post, my daughter had her '95 in central-western Maine for 4 winters with none of the trouble you described. So there is possibly a problem with your ACC.
Like this....
At 5 degrees one night, her ACC it stopped telling one of the servo motors in the air distribution box to move, so air wasn't getting routed around correctly. The ACC controls all the air movement out of the air box so if it has failed in some way and is not doing this then you will have problems. On her car it completely stopped warm air from coming into the cabin at all. She was headed home for the weekend and it was a long cold ride. I wired the flaps open until her next trip home by which time I had a used ACC to swap in (it only takes 5 minutes).
You could have some similar issues, as the servos do occasionally have problems, but more likely there's a failure in the ACC itself.
Pull the ACC (but leave it connected) and the air box is straight ahead of the ACC. There is an arm on its right side that controls air flow. Use a flashlight to see into the dash and press the buttons on the ACC to move where the air goes (ignition in on position). With the light, see if arm on the right side of the air box moves. If not, use your hand to GENTLY see if it it moves. It should have a stiff wire attached and it will have resistance of the servo, so don't use too much pressure. You do NOT want to break it! It could be that it's not moving properly--that will affect where air goes and how much of it is directed to wherever.
Also go under the hood and pull the aquarium cover. Inside the false bulkhead you can see the arm on the servo by the blower motor--more or less center line of car below the windshield. Make sure that one moves and is not broken off and that the wire is attached.
If both arms move then that's good. If one doesn't, you've found at least part of the problem. If they do move, though, it means your ACC is not sending juice to the servos. That's an internal fault and you need to get another ACC. About $100 used.
Do you have a friend with a 9000 with whom you could swap ACCs to see if your car behaves the same way with his unit? With our '95 I swapped in the good one from my '96 and it made narrowing the problem easier.
This system ain't perfect but it does work well for the most part, but they do need programming and some fault detection if they are not working right.
, Fri, 27 Jan 2012 20:14:50, Wed, 8 Feb 2012 22:19:07
, Mon, 23 Jan 2012 14:48:52, Mon, 23 Jan 2012 15:14:48, Fri, 27 Jan 2012 20:30:47, Tue, 31 Jan 2012 07:26:15, Tue, 24 Jan 2012 03:43:23, Sun, 22 Jan 2012 19:59:31
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