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-   -   White powder buildup on furnace ducting (https://www.askmehelpdesk.com/showthread.php?t=444813)

  • Feb 8, 2010, 09:29 PM
    Clemons
    White powder buildup on furnace ducting
    There is a white powder looking substance builtup on the joints of the furnace ducting. Can anyone tell me what it is and if I should be calling someone to fix this issue. Is this normal or not?
  • Feb 8, 2010, 10:14 PM
    hvac1000
    Not normal but I would have it checked out.

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