Question about Ford E-150

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I have a 91 ford van e150 i am having trouble with heat i replaced teh heater core last year and it worked fine then now it is only blowing 100 degeres and it wont clear teh window of ice it doesnt matter if your driving or sitting still the heater core is hot on both sides in and out so hot you can hardly touch it but not much heat what do i do

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  • flyinggalaxi Dec 16, 2008

    yep the fan runs fine and the core is clear all debris i am just at a loss on this is there a door or something up inside the heater box that may be in the wrong position

  • flyinggalaxi Dec 16, 2008

    is there any way to to manually put it in the right position without tearing the box apart

  • flyinggalaxi Dec 16, 2008

    well i just got in from tearing it back apart and are you referaing to the door that changes from hot to cold because it is closed and it is going through the heater core when blowing i did operate it manually and it opened and closed like it was supposed to i did check the temp at heater core and at vent it is 140 at core and 105 at vent i dont know what to do next i thought it was a problem with the seal around the core where it was allowing air to pass the core and come around it i sealed it with some hight temp tv and i think it is ok it is tons better but still not blowing much heat only 105 at the vent

  • flyinggalaxi Dec 17, 2008

    ok with that being said the core only has about 5k on it and at the core the air comming through it is 140 degrees but the vent temp is 100 degrees it is very puzzling to me

  • flyinggalaxi Dec 17, 2008

    does anybody know what the heater core temp should be

  • flyinggalaxi Dec 20, 2008

    well i figured it out it was clogged up in the heater core. i had a coolant flush done and chunks came out of the heater core now it is blowing hot. i just hope i dont have to do that more then once. thanks for all your help guys

  • David Johnson
    David Johnson May 11, 2010

    Yes it should be possible to manualy move it, you have to locate the actuator, be it a cable, a vacumn line, or electric. You may can position it with out removing the actuator, or maybe not. when you do get in the position it should be possible to wire tie it in so it will stay

  • David Johnson
    David Johnson May 11, 2010

    yes there is a door that switches the air from your ac evaporator to your heater core, if it does not completely close only part of the air from the blower will go through your heater core and the rest will bypass it making the air cool. hope this helps

  • David Johnson
    David Johnson May 11, 2010

    your blower motor works well? if so I would look for debri on my heater core that would keep air from moving through it freely hope this helps

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I can only think of two other things that could cause it not to get as hot as it should, Either there is a restriction in the heater control valve or the heater core is stopped up. If you drain your coolant and ran some radiator flush through it it might help. If I have help you please rate me... Thanks

Posted on Dec 17, 2008

  • David Johnson
    David Johnson Dec 22, 2008

    if you noticed I solved you problem, but got a thanks for trying, I make nothing from this but a rating, :(

  • David Johnson
    David Johnson Dec 22, 2008

    I can only think of two other things that could cause it not to get as
    hot as it should, Either there is a restriction in the heater control
    valve or the heater core is stopped up. If you drain your coolant and
    ran some radiator flush through it it might help. If I have help you
    please rate me... Thanks I think this should have been a fixya rating. :(

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  • 101 Answers

Does you fan run at all speeds, low med high?

Posted on Dec 16, 2008

  • 1 more comment 
  • Roscoe007 Dec 17, 2008

    Sounds like your loosing heat from your core to your vents ....

    have you inspected the heat vent lines themselves, for rips tears etc...I guess you could look at making sure your a/c compressor was not running the same time your heat was on ....imo..Hope this helps ...

  • Roscoe007 Dec 17, 2008

    Sounds like your loosing heat from your core to your vents ....
    have you inspected the heat vent lines themselves, for rips tears etc...I guess you could look at making sure your a/c compressor was not running the same time your heat was on ....imo..Hope this helps ...

  • Roscoe007 Dec 17, 2008

    I have a 97 e150 I did have a problem with my temp control switch and had to replace it.

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