no heat also
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New User
Joined: Oct 2002
Posts: 1
Likes: 0
From: lacenter us
no heat also
Have a 94 150 4x4 no heat out of any vents, heat at heater core, cool air only out of floor, dash and defrost. doors opening and closing. Baffled, dash tore out still can't see why hot air not get to vents. cool air only at outlets. Any ideas.
Elder User
Joined: Dec 2000
Posts: 570
Likes: 1
From: Austin Texas (area)
no heat also
Panel door in plenum is not being opened by its vacuum motor. Check for vacuum to that motor with the selector in 'vent' position. With vacuum to motor, check for motor operation. It could be bad vacuum motor or possibly the mechanical connection to the panel door has been 'disrupted'
Posting Guru
Joined: Dec 2001
Posts: 1,668
Likes: 3
From: Lincoln USA
no heat also
>Have a 94 150 4x4 no heat out of any vents, heat at heater
>core, cool air only out of floor, dash and defrost. doors
>opening and closing. Baffled, dash tore out still can't see
>why hot air not get to vents. cool air only at outlets. Any
>ideas.
Just a wild idea, but are your heater hoses hooked up properly?
To get the maximum heat the heater core needs to fill from the bottom to the top. Try 'reversing' your heater hoses and see if it helps.
>core, cool air only out of floor, dash and defrost. doors
>opening and closing. Baffled, dash tore out still can't see
>why hot air not get to vents. cool air only at outlets. Any
>ideas.
Just a wild idea, but are your heater hoses hooked up properly?
To get the maximum heat the heater core needs to fill from the bottom to the top. Try 'reversing' your heater hoses and see if it helps.
