[DML] Re: A/C Mode Switch Blues

["David Teitelbaum" <jtrealty@xxxxxxxxxxxxx>]

Possible causes include a hose that fell off, a broken or cracked
hose, a bad actuator, a mistake in reassembling the Mode switch,
putting the hoses back on the wrong spots. The fan speed has no effect
on which vents the air comes out, it only affects the amount. Pull the
Mode switch and make sure you did it correctly. Get the Workshop
Manual and make sure each hose is where it belongs. Get a small hand
operated vacuum tester. They are not expensive. With it you can test
the hoses for leaks and the actuators to make sure they are connected
properly and that they move. The hoses have a splash of color near the
ends for identification. You should not hear any hissing except when
you move the Mode switch for a moment till the actuators get into the
new positions.
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, mike <cambpd@...> wrote:
>
> Last year I rebuilt my A/C Mode Switch to try and
> correct the problem of very little air coming out of
> the dash vents, and hissing from the A/C Mode Switch
> vent position. I reinstalled the switch with (unlike
> the way I found it) all the vacuum hoses connected and
> to the correct positions.  
> 
> What I ended up with was absolutely no air coming out
> of the dash vents with the fan on high speed, and now
> constant hissing from both the vent and heater/floor
> positions. I even disconnected the vent door linkage
> to keep the door permanently open! But the only air I
> have coming out is from the floor vents.  
> 
> To keep from melting this summer, I am considering
> stuffing the floor vents with rags to try and direct
> at least some air to the dash vents!!  
> 
> Why would hooking up the hoses to the A/C Mode Switch
> cause constant hissing and no air from the dash
> vents??
> Because of this, I am sure that all the actuators are 
> not working.
> 
> Would appreciate any advice!  Thanks.
> 
> Mike
> #5781 
> 
> 
> 
> 
>  
>
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