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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Heater blend door problem 1996 f350

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Old Nov 24, 2022 | 10:55 AM
  #1  
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Heater blend door problem 1996 f350

The heat blend door on my truck is rotated by a red lever on top of the AC housing - behind the glove compartment. The post on the red lever engages into a white plastic piece that the control cables turn when the heat/cold **** is turned. The post on the red piece, on my truck, is broken off, so I have no way to turn on the heat. This photo is not mine. Mine is missing the post. Does this plastic piece slip out? - or is it part of the shaft. I don't want to break it off, but if it is separate from the actual blend door shaft, then I will pull it off and try to repair or replace it.

 
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Old Nov 24, 2022 | 11:08 AM
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Been to long ago for me to remember 100% but I think that red part just pushes down on shaft that was flat on 1 side.
 
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Old Nov 24, 2022 | 02:35 PM
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I think that red piece is the top of the blend door. I don’t believe you can replace that separately.
 
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Old Nov 25, 2022 | 12:55 PM
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I did discover that the red lever did pop out with a little effort. Now I have to find one of those, and they are not to be found. I might get lucky and find one at a junkyard if some of the dash has already been removed.
 
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Old Nov 25, 2022 | 01:46 PM
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I think it should be fairly easy to replace that post with something similar. Even if the post was metal you could attach it from the bottom with a screw. If you made a plastic post, JB Weld has plastic adhesive to attach them.
 
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Old Nov 25, 2022 | 03:08 PM
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Originally Posted by sandymane
I think it should be fairly easy to replace that post with something similar. Even if the post was metal you could attach it from the bottom with a screw. If you made a plastic post, JB Weld has plastic adhesive to attach them.
I was thinking a small screw same size as post was with nice large washer on both sides of the red plastic and a self locking nut
 
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Old Nov 25, 2022 | 03:10 PM
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Originally Posted by toolman60
I was thinking a small screw same size as post was with nice large washer on both sides of the red plastic and a self locking nut
Sure, that's a good idea also.
 
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Old Nov 25, 2022 | 03:22 PM
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At least that get him working until he finds a good 1 at the pick an pull.
 
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Old Jan 4, 2023 | 01:19 PM
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I got one at the junk yard, and put it on. That red piece is carefully engineered so that it will be the only thing that will fit into that blend door shaft. I still don't get any heat through the vents, and my blend door is working. I pulled the heater core, and it is clean and hot when the water is going through it. I'll figure it out eventually.
 
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Old Jan 4, 2023 | 01:28 PM
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Is your white vacuum line completely in tact? Your white vac line will not have the piece like mine where it T's off.

 
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Old Jan 4, 2023 | 01:31 PM
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You not getting heat thru the vents but have heat for defrost and floor?
 
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Old Jan 5, 2023 | 02:31 PM
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Hey I also don't have heat in mine, and now I know where to look for why. Thanks!
 
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Old Jan 5, 2023 | 03:20 PM
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Thumbs up

Originally Posted by seijirou
Hey I also don't have heat in mine, and now I know where to look for why. Thanks!


I told you this! My peg failed on the '92, luckily late trucks had an updated push/pull cable setup. There is some TSB on it, I will try to find it and post for you guys.

Of course, you can just install a late box
 
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Old Jan 5, 2023 | 03:21 PM
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https://www.supermotors.net/registry/media/665548_1

Ask and ye shall receive.
 
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Old Jan 5, 2023 | 04:02 PM
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Originally Posted by Hit Man X
I told you this! My peg failed on the '92, luckily late trucks had an updated push/pull cable setup. There is some TSB on it, I will try to find it and post for you guys.

Of course, you can just install a late box
What you told told me was you were going to come over and look
 
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