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-   -   90 Burb....fan blows only @ floor (https://67-72chevytrucks.com/vboard/showthread.php?t=507340)

Stringer 02-05-2012 03:25 PM

90 Burb....fan blows only @ floor
 
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Need more hand-holding, please. Been reading old posts but it's not sinking in, I guess.

Got air and heat but it only blows out the floor vent. It'd be nice to have defrost, etc.! I know the plastic door pull is broken but the cable doesn't have any movement anyway. I mean - moving the selector switch does nothing. I don't hear any actuators actuatin' - no clicking under the dash. Is this most likely a vac problem? Any other thoughts?

:5150: finally - new CD - 2-7-12

kwin 02-05-2012 03:32 PM

Re: 90 Burb....fan blows only @ floor
 
I have had this problem with some of the Fords in the fleet that I manage, it seems to come down to actuator motors ( vacuum motors in your case ) or jammed flaps. For the new fords it's a $2000.00+ repair!

I know thats not much to work with but i think you are on the right track.

68Timber 02-05-2012 07:36 PM

Re: 90 Burb....fan blows only @ floor
 
The switch does fail. If you don't hear it moving air when you move the switch then make sure it is getting vacuum.

motornut 02-08-2012 06:39 PM

Re: 90 Burb....fan blows only @ floor
 
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check here too,from my 88

Stringer 02-08-2012 06:59 PM

Re: 90 Burb....fan blows only @ floor
 
Thanks. I bet defrost in Ottawa is more essential than in North Texas but it's still a PITA not having it. Anybody know of a way to test the actuators-the round thing the vac line is hooked to?

motornut 02-08-2012 07:49 PM

Re: 90 Burb....fan blows only @ floor
 
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haha can't start the day without it lol
blow and suck......cheap n ez lol
i've used the washer/wiper hose to check them

Jonboy 02-13-2012 07:15 PM

Re: 90 Burb....fan blows only @ floor
 
If that clip doesn't fix it, the vacuum switch on the back of the A/C control head may be the culprit. They are prone to going bad, too.

Stringer 02-13-2012 08:18 PM

Re: 90 Burb....fan blows only @ floor
 
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Thanks to everybody for the help. I think I've got it fixed as of yesterday. A: broken vacuum line under hood. B: broken clip on the blend door. I artfully crafted a Copenhagen lid to take care of that. Next project is getting some lights to work behind the gas gauge. Thanks again.


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