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help a heat pump hack fix a furnace

Discussion in 'Residential' started by Swampfox, Nov 16, 2017.

  1. Swampfox

    Swampfox red tagged

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    ICP N8MPN050B12B1 2007 vintage, little guy

    pressure switch code, 3 blinks, switch tests out good and the tubing is good

    found flue blocked with wasp nest and dirt dobbers, cleaned that mess out, I was all proud and thought I had it fixed, but the pressure switch still wont close

    ran inducer with flue disconnected and it isnt moving much air, so I think the exchanger might be clogged up, but I took it apart and couldnt see anything, its a clamshell style if that matters

    the inducer motor is pretty new and moves a lot of air when its off the furnace
     
  2. HMD

    HMD does it matter?

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    jump out the switch
     
  3. Swampfox

    Swampfox red tagged

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    that throws the 2 blink code lol
     
  4. HMD

    HMD does it matter?

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    put a piece of 'lectric tape over the blinker.
    :thumb:
     
    John Ringo, Zman and Texas-Tech like this.
  5. HMD

    HMD does it matter?

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    sorry boss, i aint much help
     
  6. jpb2

    jpb2 Dog Tard *

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    within the bounds of reality
    If you have a "smart valve" model please run. I have no idea why if all clear it doesnt go
     
  7. Swampfox

    Swampfox red tagged

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    no just a dumb valve
     
  8. Texas-Tech

    Texas-Tech Official Geezer*

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    duhh
    You can jump the pressure switch but only after the motor starts running
    did you put your manmeter on the pressure port yet?
     
    Zman likes this.
  9. doc havoc

    doc havoc A cunning linguist

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    Did you try running it with both pipes disconnected? Or is it single piped? Vent length and number of elbows? Maybe a plugged condensate drain?
     
    Rather B Riding likes this.
  10. Swampfox

    Swampfox red tagged

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    B vent straight up through roof
     
  11. doc havoc

    doc havoc A cunning linguist

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    Oops! I'm so used to seeing 90% I just "assumed".
     
  12. knave

    knave Undeterred

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    Out for a rip
    Tee in with manometer.
    Is the port clear? Wheel clean?
    Measure draft in vent...
     
  13. Swampfox

    Swampfox red tagged

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    port clear, wheel clean

    didnt have mano with me, but with flue disconnected it isnt moving much air
     
  14. Zman

    Zman Hanging by a Thread

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    The "I know a Guy" State
    How did you test the switch? Suckin it closed don't count as a test.
     
  15. Swampfox

    Swampfox red tagged

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    tech before me replaced pressure switch didnt help, tried both today and neither would close
     
  16. 22blood

    22blood red wire nuts only

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    Sometimes ive put the tubing on the wrong side of the new switch
     
  17. chucko615

    chucko615 Banned camp counselor

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    Did you clean the port on the inducer
     
  18. chucko615

    chucko615 Banned camp counselor

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    I use a paperclip to poke the port
     
    Fred Meebley likes this.
  19. knave

    knave Undeterred

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    HEY! We covered that :)
     
    chucko615 likes this.
  20. LemonWizard

    LemonWizard Blinky Lights Wizard

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    Ohighyo
    Bees made nests in heat ex?