heat exchanger rust ?


  #1  
Old 10-01-09, 05:41 PM
J
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heat exchanger rust ?

so our igniter is fine but the gas valve is bad and we need a new one. While the tech was here he scope the heat exchanger and saw some rust and showed it to me. There seemed to be light rust down the seams and along the tops pimple spots that where a little more noticeable ( but not holes yet ) . So he suggested it to either be fixed or look into a new furnace. For a factor remanufactured of the exchanger with labor is around 1500 + 500 for the gas valve also. New unit is 3400 installed with a tax credit for 1500 because it is 94+ efficient.

So what our your thoughts on all of this ..oh furnace is about 15 years old and ac 10 years.
 
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Old 10-02-09, 04:56 AM
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It's common to have some surface rust inside a heat exchanger. You either need to have this contrator do a better check of the exchanger or call someone who knows what they are doing.
 
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Old 10-02-09, 08:09 AM
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As Mattison recommended, get a second opinion and/or a closer evaluation by the first contractor. A 15 year old furnace should have around 5-10 years of life left in it.

However, if the heat exchanger IS bad, your two options come down to this: replace the heat exchanger and gas valve for $2,000, or replace the furnace with a new high efficiency model for $1,900 (after tax credits are figured in). Seems pretty clear to me going with the new furnace would be wisest.
 
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Old 10-02-09, 10:45 AM
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That amount of money for a standard gas valve is high. Some rust is normal in heat exchangers. 1500 to replace a heat exchanger that is probably covered by warranty is also high. I bet they are using flat rate pricing. You would be better off using a company that charges for time and material.
 
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Old 10-05-09, 06:37 PM
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thanks everyone .. second opinion .
The heat exchanger is fine and the pilot just need to be cleaned .
 
 

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