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Old 11-12-2012, 08:30 PM   #16
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yep 99 out of 100 is really high...in my 40 yrs of business on standing pilot furnaces we may have found 25-30 and we checked and serviced alot more than 100 furnaces...ben sr


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Old 11-12-2012, 08:46 PM   #17
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Marty's not saying 99/100 furnaces have cracked heat exchangers, he's saying 99/100 exhibiting the symptom he described have cracked heat exchangers.
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Old 11-12-2012, 09:37 PM   #18
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That explains it. Our customers replaced those standing pilots 20 years ago. When I get a call like the OP it's a 25-40 year old furnace that hasn't been touched in a decade or two. I could count on one hand the number of them in the last 10 years that passed a heat exchanger inspection. Usually a rust hole right over the pilot.


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