[V8] Heater/defroster flap motor.

[Dave Saad]

You are talking about the temperature regulator motor which is indeed  
electric and mounted under the hood.  The original problem stated by  
Rich though was the heat/defrost flap motor which on my '91 is a  
vacuum motor controlled by a bunch of solenoid valves in a control  
box near the glove box. I am pretty sure this is the same control  
unit used on lesser models, maybe all the way back to the 5000.  It  
is a Delco part and may also be available from a GM dealer if any  
still exist....

My plan of attack on this would be:
1. verify vacuum supply from supply tank is good. There is a check  
valve in there somewhere too.

2. use the diagnostic mode to operate the flap motor. If it fails to  
move, check for vacuum at the motor. If it is present then the motor  
is stuck or broke. If not, the solenoid valve is either bad or it i  
not being "told" to turn on/off. That leads to either a wiring  
problem or broken valve control unit or broken control head (the part  
with the LED readout and buttons)

My money is on a broken vacuum line under the hood - and actually  
none of the vacuum motors work.

Dave

On Dec 11, 2008, at 6:36 AM, kneale at coslink.net wrote:

> I thoutht all the V8s were like the 200q20vs that have the electric  
> motor
> on the driver side of the heater core box.
>
> Look for a bunch of Phillips head screws holding a cover onto the  
> box.  You
> need to remove the wiper linkage to get access to all the screws.   
> First
> one of those motors I got was about $60.  Last one was over $80.
>
> Original Message:
> -----------------
> From: Dave Head v8q at bellsouth.net
> Date: Wed, 10 Dec 2008 22:03:24 -0500
> To: dsaad at icehouse.net, V8 at audifans.com
> Subject: Re: [V8] Heater/defroster flap motor.
>
>
> I can't remember - I know the 92 up cars went to electric motors  
> for the
> other motors. You can go into the diagnostics and operate them...
>
> Dave Saad wrote:
>> If I remember right, it is a vacuum motor - so the motor itself is
>> easy to test if you can expose the tube that goes to it.  Maybe the
>> best place to do that would be the vacuum switch module which is
>> mounted up around the glove box.
>>
>> I think there is a diagnostic mode for the climate control system too
>> - where you can step through all the functions and watch for things
>> to move.
>>
>> Before you get too carried away though, have you looked for broken or
>> loose vacuum lines?
>>
>> Dave
>>
>>
>> On Dec 10, 2008, at 6:49 PM, Rich Ehlert wrote:
>>
>>> Hi all.
>>> I am having trouble with my heater/defrost flap motor.  Has anyone
>>> had any
>>> experience with getting that thing to work?
>>> Thanks,
>>> Rich
>>> '93 V8
>>> _______________________________________________
>>> Audifans V8 mailing list
>>> Send posts to: mailto:V8 at audifans.com
>>> Manage your list connection: http://www.audifans.com/mailman/
>>> listinfo/v8
>>>
>>> You can help keep the audifans site running by shopping at http://
>>> audifans.com/shop/
>>>
>>
>> _______________________________________________
>> Audifans V8 mailing list
>> Send posts to: mailto:V8 at audifans.com
>> Manage your list connection: http://www.audifans.com/mailman/ 
>> listinfo/v8
>>
>> You can help keep the audifans site running by shopping at
> http://audifans.com/shop/
>>
>>
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/ 
> listinfo/v8
>
> You can help keep the audifans site running by shopping at
> http://audifans.com/shop/
>
>
>
> --------------------------------------------------------------------
> mail2web.com – What can On Demand Business Solutions do for you?
> http://link.mail2web.com/Business/SharePoint
>
>