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Carrier Weathermaker 8000 furnace



 
 
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  #1  
Old August 27th 05, 06:09 PM
Tony Hwang
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Default Carrier Weathermaker 8000 furnace

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
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  #2  
Old August 27th 05, 06:30 PM
Tony Hwang
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Posts: n/a
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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BTW, the original board is obsolete.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
  #3  
Old August 30th 05, 11:46 AM
Carolina Breeze HVAC
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Posts: n/a
Default


"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.....


 




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