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Old 01-18-2021, 06:11 PM   #2
bobbecky
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Join Date: Jul 2013
Location: Box Elder
Posts: 2,907
Whatever is causing that, there is a blockage or something causing a rich condition. Hopefully it is something easy to clear up without having to disassemble the furnace.
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2012 Chevy 2500HD D/A CC
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