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Posted by Myhvacisdead on August 20, 2006, 10:16 am
Thanks.
I'm checking this out now.
And thanks for all the other comments. I figured I was on the hook for
one board but not both. I'm extra confident in that idea now.
tech wrote:
> HVAC-Talk . com
>
> They love to answer questions like this!
>
>
> > Hello,
> >
> > I have a 11 year old Goodman gas furnace (model gmp125-5) with a 3 ton
> > central air unit (southern Pennsylvania).
> > The a/c quit working a few weeks ago. I had a serviceman come out and
> > he said the control board had burn spots on it. He put in a new
> > control board, turned on the system, it ran for about 1 minute and then
> > burnt up the replacement board.
> > I was told that the thermostat (basic round dial one) could be causing
> > a short so I put in a digital programmable thermostat. They put in a
> > second control board. The tech was going to turn on the a/c again and
> > I said let's just turn the blower fan from auto to on first and see how
> > that works. We did that and the control board burnt out again after
> > 1/2 minute or so. He tested the wires from the thermostat to the
> > control board and there was no short in them.
> >
> > The control boards are $170 each and my repair bill so far is close to
> > $500. I've called several hvac shops in the area and the general
> > concensus is that troubleshooting a short in the system could be quite
> > costly and considering the system is 11 years old, it would be better
> > to replace it.
> > Thoughts/Comments?
> >
> > My second question is this: How much should it cost (ballpark) for a
> > new natural gas furnace and central air system? My house is ~2600 sq
> > ft, 2 floors. I had an Amana supplier come out and do a engineering
> > analysis. She said the 3 ton a/c unit is too small for my house and
> > that I should have a 4 ton unit.
> > She gave me quotes on new systems and I'm in shock at the price quotes,
> > which range from $6500 for a system with the cheapest parts (13 seer
> > a/c with 5 yr compressor warranty, 80% gas furnace) all the way to
> > $11,000 for a 16 seer a/c with lifetime compressor/10 yr parts and a
> > 96% gas furnace with variable speed blower and lifetime heat exchanger.
> >
> > I was hoping I could get a efficient system for $5000-$6000 installed.
> > Are the high-efficiency furnace and a/c units really that much more
> > expensive and/or more involved to install - or is this place charging a
> > premium to install the high-end components?
> >
> > Thanks ahead of time for any guidance you can offer!!!
> >
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