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Posted by Bubba on October 20, 2007, 9:35 am
wrote:
>Greetings,
>
>I have an older Carrier 58ss that water from the collector leaked and
>made its way to the blower control circuit board. We started having a
>problem with the fan always being on so we called the company we have
>service the furnace and AC come out. When the guy turned the furnace
>on the blower control board shorted and started a fire(quickly
>extinguished). He said it wasn't worth fixing and we should buy a new,
>but would replace burnt circuit board and wiring harness for $800 if we
>insisted.
Older is key. That is one of Carrier/Bryants fuckups. Anytime a water
leak occurs it goes straight to the back of the circuit board and
Kaboom. It fries, shorts, pops and usually takes out ANOTHER componet
or two.
>
>Before I get flamed for being a total idiot who shouldn't be messing
>with furnaces:
Bingo. You have your answer. Step away from the machine
>1) I have always had the unit serviced by the same company in the past.
Has nothing to do with the leak
>2) The "expert" is the one that applied power to the board after being
>told of the water leak causing the real fire that smoked the board
No, the "expert" is the one that owns the furnace. That would be you.
Im sure its nice and comfortable at the techs home. Nice try though
trying to put the blame on the tech you skinflint.
>3) I don't want to spend $4K for a new furnace
I dont want to pay $3.00 a gallon for gas either.
>4) $800 to replace a plug in wiring harness and a circuit board that
>has a dealer cost of less than $100 is IMHO unreasonable
Wrong Wrong Wrong. You have no idea what he paid then. I just did one
this week. Same exact problem. It needed the board, wiring harness,
gas valve (shorted) AND a new inducer although the inducer was froze
up from another problem.
Hint: The board and harness are well over $100 you retard.
>5) I am not a furnace expert, but I can read and understand schematics.
Obviously you cant.
>I have been an engineering manager at a large electronics manufacturing
>company for over 20 years including several years managing a circuit
>board assembly plant.
So obviously you've been asleep on the job the last 20 years.
>
>
>The control board part was HH84AA005 is obsolete, the Carrier
>replacement is HH84AA021. I also replaced the tranformer(scorched by
>the flames) and the relay on the inducer board(corroded contacts from
>the water dripping down).
You unsoldered and resoldered the relay on the inducer board?
What an idiot.
> After installation, everything worked except
>that there was no 24V to the Pick coil (terminal #3) of the gas valve.
Yeah, so obviously you dont know the secret.
>
>While it is supposed to be a drop in replacement(if you believe the
>docs), the board is significantly different with additional functions
>and features. One big difference is that 10B1-2 that needs 24V can be
>traced directly to the C terminal which goes straight to ground through
>a plated mounting hole on the circuit board. There is no grounding on
>the old board at all.
Again, you've missed the "secret" bulletin on that unit to make it
work.
>
>Does anyone know if there is a service bullitin with modifications
>required to make HH84AA021 work in a furnace that was shipped with a
>HH84AA005? Any other insights would be greatly appreciated.
>
Yes, I do know there is a bulletin out. It was actually out a long
long time ago. Unfortunately, tight asses like you arent worthy of the
answer. Too bad you bought your board from a company that couldnt tell
you that you may need the secret repair.
>Thank you very much,
>
You're welcome Bob and I hope you have a long and cold winter.
Bubba
(oh yeah, BITE ME)
>Bob
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