Carrier Weathermaker 8000 furnace

Discussion in 'Home Repair' started by Tony Hwang, Aug 27, 2005.

  1. Tony Hwang

    Tony Hwang Guest

    Hi,
    ~10 year old furnace started intermittent lock up with error code 31.
    Careful investigation revealed intermittent inducer motor. It starts
    but stops running or it won't start when heat is called for.
    Took the control board out(HK42FZ004) and went through it. The problem
    found was cracked solder joint on two high Wattage resistors R34 and R33
    (both 330 Ohms) had cracked solder joints on the PCB due to heat(?).
    Reinforced the joints with silver solder. Now furnace is behaving normal
    again. Google search showed it is known problem mentioned in service
    bulletin. Going price for replacement board is ~200.00.
    Hope this may be of some help for someone who has same furnace type.
    (Carrier, Bryant, Payne brand uses same board I believe).
    Tony
     
    Tony Hwang, Aug 27, 2005
    #1
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  2. Tony Hwang

    Tony Hwang Guest

    Tony Hwang wrote:
    > Hi,
    > ~10 year old furnace started intermittent lock up with error code 31.
    > Careful investigation revealed intermittent inducer motor. It starts
    > but stops running or it won't start when heat is called for.
    > Took the control board out(HK42FZ004) and went through it. The problem
    > found was cracked solder joint on two high Wattage resistors R34 and R33
    > (both 330 Ohms) had cracked solder joints on the PCB due to heat(?).
    > Reinforced the joints with silver solder. Now furnace is behaving normal
    > again. Google search showed it is known problem mentioned in service
    > bulletin. Going price for replacement board is ~200.00.
    > Hope this may be of some help for someone who has same furnace type.
    > (Carrier, Bryant, Payne brand uses same board I believe).
    > Tony


    BTW, the original board is obsolete. Replacement board conversion kit if
    needed with wiring harness has p/n: 325878-751
     
    Tony Hwang, Aug 27, 2005
    #2
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  3. "Tony Hwang" <> wrote in message
    news:Gq1Qe.320054$s54.70742@pd7tw2no...
    > Tony Hwang wrote:
    >> Hi,
    >> ~10 year old furnace started intermittent lock up with error code 31.
    >> Careful investigation revealed intermittent inducer motor. It starts
    >> but stops running or it won't start when heat is called for.
    >> Took the control board out(HK42FZ004) and went through it. The problem
    >> found was cracked solder joint on two high Wattage resistors R34 and R33
    >> (both 330 Ohms) had cracked solder joints on the PCB due to heat(?).
    >> Reinforced the joints with silver solder. Now furnace is behaving normal
    >> again. Google search showed it is known problem mentioned in service
    >> bulletin. Going price for replacement board is ~200.00.
    >> Hope this may be of some help for someone who has same furnace type.
    >> (Carrier, Bryant, Payne brand uses same board I believe).
    >> Tony

    >
    > BTW, the original board is obsolete. Replacement board conversion kit if
    > needed with wiring harness has p/n: 325878-751


    And can be bought by any legitimate tech for under $50.....
     
    Carolina Breeze HVAC, Aug 30, 2005
    #3
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