Heater help needed
Thread Starter
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Elder User
Joined: May 2012
Posts: 978
Likes: 1
From: Covington VA
Heater help needed
Hey guys, 86 f150 non ac
Changed the heater core today. Cleaned some trash from the side that goes to the kick panel vent, but didn't feel any in the actual heater ducting side. I can hear the doors move with the cable. Fan works on all 3 speeds, bird cage is in good shape.
My issue is I get a tiny amount of air flow both on the floor and out of the defrost. Not even enough air to make paper flutter. It will eventually defog my windshield but takes 5 minutes or more.
Can y'all point me in the next step direction I can look at or check? Is there a different name for the ducting I can use to search out more info? I have read a few google results from here but they had airflow that wouldn't change from vents to defrost. I have no flow.
I appreciate your help.
Changed the heater core today. Cleaned some trash from the side that goes to the kick panel vent, but didn't feel any in the actual heater ducting side. I can hear the doors move with the cable. Fan works on all 3 speeds, bird cage is in good shape.
My issue is I get a tiny amount of air flow both on the floor and out of the defrost. Not even enough air to make paper flutter. It will eventually defog my windshield but takes 5 minutes or more.
Can y'all point me in the next step direction I can look at or check? Is there a different name for the ducting I can use to search out more info? I have read a few google results from here but they had airflow that wouldn't change from vents to defrost. I have no flow.
I appreciate your help.
Laughing Gas
Joined: Jan 2013
Posts: 1,015
Likes: 4
From: Gulf Coast, MS
Sounds like the door is broken, just repaired mine.
https://www.ford-trucks.com/forums/1...rost-door.html
Here is how I fixed mine. Does your truck have factory ac cause if not it may be totally different.
https://www.ford-trucks.com/forums/1...rost-door.html
Here is how I fixed mine. Does your truck have factory ac cause if not it may be totally different.
FTE Legend
Joined: Nov 2015
Posts: 30,855
Likes: 4,105
From: Angier, NC
I have not pulled my non-ac box apart as I am going with an ac box and you are right the doors move by cables as my 81 does.
Now what I do not know is if the doors both ac and non-ac use that crap plastic hinge. I would guess it is the same and the hinge broke and the only way to know for sure is to pull it apart to make sure.
I don't think I can get out to the garage today to check mine as it is out of the truck on the shelf but will try and get back.
Dave ----
Now what I do not know is if the doors both ac and non-ac use that crap plastic hinge. I would guess it is the same and the hinge broke and the only way to know for sure is to pull it apart to make sure.
I don't think I can get out to the garage today to check mine as it is out of the truck on the shelf but will try and get back.
Dave ----
Thread Starter
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Elder User
Joined: May 2012
Posts: 978
Likes: 1
From: Covington VA
I got it figured out. My blower motor was running the wrong direction. The po had cut the 2 wires, I assume to install a new motor. Anyway he hooked them back up backwards. It's a D.C. Motor so I just cut out the butt splices, added male and female spades, and hooked them back together.
It's working much better. Not quite what I was hoping for but 1000% better than I had.
Thanks for y'all input.
It's working much better. Not quite what I was hoping for but 1000% better than I had.
Thanks for y'all input.
Posting Guru
Joined: Jul 2015
Posts: 2,239
Likes: 5
From: Northeast Ohio USA
I got it figured out. My blower motor was running the wrong direction. The po had cut the 2 wires, I assume to install a new motor. Anyway he hooked them back up backwards. It's a D.C. Motor so I just cut out the butt splices, added male and female spades, and hooked them back together.
It's working much better. Not quite what I was hoping for but 1000% better than I had.
Thanks for y'all input.
It's working much better. Not quite what I was hoping for but 1000% better than I had.
Thanks for y'all input.
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FTE Legend
Joined: Nov 2015
Posts: 30,855
Likes: 4,105
From: Angier, NC
One of my trucks was rewired and also think because of blower motor replacement.
Dave - - - -
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